diff --git a/ext/3rd-party-addons/website_multi_company_sale/README.rst b/ext/3rd-party-addons/website_multi_company_sale/README.rst
new file mode 100644
index 00000000..73b098da
--- /dev/null
+++ b/ext/3rd-party-addons/website_multi_company_sale/README.rst
@@ -0,0 +1,45 @@
+==========================================
+ Real Multi Website (eCommerce extension)
+==========================================
+
+Multi Website support in eCommerce:
+
+* adds field ``website_ids`` to payment.acquirer
+* adds field ``website_ids`` to product.template
+* adds field ``website_ids`` to product.public.category
+* use separate sale order (cart) for different companies -- works by adding ``company_dependent`` attribute to ``last_website_so_id`` field
+
+
+Credits
+=======
+
+Contributors
+------------
+* `Ivan Yelizariev <https://it-projects.info/team/yelizariev>`__
+
+Sponsors
+--------
+* `IT-Projects LLC <https://it-projects.info>`__
+
+Maintainers
+-----------
+* `IT-Projects LLC <https://it-projects.info>`__
+
+      To get a guaranteed support you are kindly requested to purchase the module at `odoo apps store <https://apps.odoo.com/apps/modules/11.0/website_multi_company_sale/>`__.
+
+      Thank you for understanding!
+
+      `IT-Projects Team <https://www.it-projects.info/team>`__
+
+Further information
+===================
+
+Demo: http://runbot.it-projects.info/demo/website-addons/11.0
+
+HTML Description: https://apps.odoo.com/apps/modules/11.0/website_multi_company_sale/
+
+Usage instructions: `<doc/index.rst>`_
+
+Changelog: `<doc/changelog.rst>`_
+
+Tested on Odoo 11.0 f34d4d33a09d33a12e427c2490b6526546114486
diff --git a/ext/3rd-party-addons/website_multi_company_sale/__init__.py b/ext/3rd-party-addons/website_multi_company_sale/__init__.py
new file mode 100644
index 00000000..f7209b17
--- /dev/null
+++ b/ext/3rd-party-addons/website_multi_company_sale/__init__.py
@@ -0,0 +1,2 @@
+from . import models
+from . import controllers
diff --git a/ext/3rd-party-addons/website_multi_company_sale/__manifest__.py b/ext/3rd-party-addons/website_multi_company_sale/__manifest__.py
new file mode 100644
index 00000000..82cdb1da
--- /dev/null
+++ b/ext/3rd-party-addons/website_multi_company_sale/__manifest__.py
@@ -0,0 +1,42 @@
+{
+    "name": """Real Multi Website (eCommerce extension)""",
+    "summary": """Multi Website support in eCommerce""",
+    "category": "eCommerce",
+    "live_test_url": "http://apps.it-projects.info/shop/product/website-multi-company?version=11.0",
+    "images": ["images/website_multi_company_sale_main.png"],
+    "version": "11.0.1.2.0",
+    "application": False,
+
+    "author": "IT-Projects LLC, Ivan Yelizariev",
+    "support": "apps@it-projects.info",
+    "website": "https://it-projects.info/team/yelizariev",
+    "license": "LGPL-3",
+    "price": 9.00,
+    "currency": "EUR",
+
+    "depends": [
+        "website_multi_company",
+        "website_sale",
+        "ir_rule_website",
+    ],
+    "external_dependencies": {"python": [], "bin": []},
+    "data": [
+        "views/product_public_category_views.xml",
+        "views/website_views.xml",
+        "views/product_template_views.xml",
+        "views/payment_views.xml",
+        "security/website_multi_company_sale_security.xml",
+    ],
+    "qweb": [
+    ],
+    "demo": [
+    ],
+
+    "post_load": None,
+    "pre_init_hook": None,
+    "post_init_hook": None,
+    "uninstall_hook": None,
+
+    "auto_install": False,
+    "installable": True,
+}
diff --git a/ext/3rd-party-addons/website_multi_company_sale/controllers/__init__.py b/ext/3rd-party-addons/website_multi_company_sale/controllers/__init__.py
new file mode 100644
index 00000000..12a7e529
--- /dev/null
+++ b/ext/3rd-party-addons/website_multi_company_sale/controllers/__init__.py
@@ -0,0 +1 @@
+from . import main
diff --git a/ext/3rd-party-addons/website_multi_company_sale/controllers/main.py b/ext/3rd-party-addons/website_multi_company_sale/controllers/main.py
new file mode 100644
index 00000000..9aaff502
--- /dev/null
+++ b/ext/3rd-party-addons/website_multi_company_sale/controllers/main.py
@@ -0,0 +1,19 @@
+from odoo import http
+from odoo.http import request
+from odoo.addons.website_sale.controllers.main import WebsiteSale
+
+
+class WebsiteMultiCompanySale(WebsiteSale):
+    @http.route()
+    def shop(self, page=0, category=None, search='', ppg=False, **post):
+        response = super(WebsiteMultiCompanySale, self).shop(page=page, category=category, search=search, ppg=ppg, **post)
+        categs = request.env['product.public.category'].search([
+            ('parent_id', '=', False),
+            '|',
+            ('website_ids', '=', False),
+            ('website_ids', 'in', [request.website.id]),
+        ])
+        response.qcontext.update({
+            'categories': categs,
+        })
+        return response
diff --git a/ext/3rd-party-addons/website_multi_company_sale/doc/changelog.rst b/ext/3rd-party-addons/website_multi_company_sale/doc/changelog.rst
new file mode 100644
index 00000000..61cd61f5
--- /dev/null
+++ b/ext/3rd-party-addons/website_multi_company_sale/doc/changelog.rst
@@ -0,0 +1,24 @@
+`1.2.0`
+-------
+
+- **ADD:** you can now specify allowed websites for your payment acquirers
+
+`1.1.0`
+-------
+
+- **ADD:** you can now specify allowed websites for your products
+
+`1.0.2`
+-------
+
+- **ADD:** possibility to specify Salesperson, Sales Channel per each website
+
+`1.0.1`
+-------
+
+- **FIX:** add multi-company support for carts
+
+`1.0.0`
+-------
+
+- Init version
diff --git a/ext/3rd-party-addons/website_multi_company_sale/doc/index.rst b/ext/3rd-party-addons/website_multi_company_sale/doc/index.rst
new file mode 100644
index 00000000..0de660a1
--- /dev/null
+++ b/ext/3rd-party-addons/website_multi_company_sale/doc/index.rst
@@ -0,0 +1,72 @@
+==========================================
+ Real Multi Website (eCommerce extension)
+==========================================
+
+Installation
+============
+
+* `Install <https://odoo-development.readthedocs.io/en/latest/odoo/usage/install-module.html>`__ this module in a usual way
+
+Configuration
+=============
+
+Follow instruction of the base module `Real Multi Website <https://www.odoo.com/apps/modules/11.0/website_multi_company/>`__.
+
+Website Orders
+--------------
+
+* Open menu ``[[ Website ]] >> Configuration >> Websites``
+* For each website configure **Salesperson** and **Sales Channel** fields
+* RESULT: new orders made via website will be assigned to proper Salesperson and Sales Channel
+
+Multi-categories
+----------------
+
+* Open menu ``[[ Website ]] >> Configuration >> Products >> eCommerce Categories``
+* Only for top-level (i.e. without ``parent_id``) categories: specify **Websites** field
+
+Multi-products
+--------------
+* Open menu ``[[ Sales ]] >> Sales >> Products``
+* Specify **Allowed websites** for your products
+* Websites company and product company should be equal. But if you want different company websites then leave the **Company** field empty in your product - in such case you can specify any websites
+
+Multi-payment-acquirers
+-----------------------
+* Open menu ``[[ Website ]] >> Configuration >> eCommerce >> Payment Acquirers``
+* Specify **Allowed websites** for your payment acquirer. If no website is specified then the acquirer will be available on any website with the same company
+* Choosen websites companies and acquirer's company should be equal
+
+
+Usage
+=====
+
+Multi-categories
+----------------
+
+* Open shop at some of your websites
+* Login as Administrator
+* In ``Customize`` section activate ``[x] eCommerce Categories``
+* RESULT: parent categories for current website and categories without value at **Websites** fields are shown only. **Websites** value of child categories are ignored.
+
+Multi-cart
+----------
+
+* Login as portal or internal user at some of your websites
+* Add some products to the cart
+* Open another website that belongs to another company
+* Login as the same user
+* RESULT: you have empty cart, rather than one from previous website
+
+Multi-products
+--------------
+
+* Open website shop
+* RESULT: you should only see products allowed for this website or products with no websites specified
+
+Multi-payment-acquirers
+-----------------------
+
+* Open website shop
+* Buy a product
+* On Payment step of checkout there should be available only specified acquirers
diff --git a/ext/3rd-party-addons/website_multi_company_sale/images/website_multi_company_sale_main.png b/ext/3rd-party-addons/website_multi_company_sale/images/website_multi_company_sale_main.png
new file mode 100644
index 00000000..2478e3c9
Binary files /dev/null and b/ext/3rd-party-addons/website_multi_company_sale/images/website_multi_company_sale_main.png differ
diff --git a/ext/3rd-party-addons/website_multi_company_sale/models/__init__.py b/ext/3rd-party-addons/website_multi_company_sale/models/__init__.py
new file mode 100644
index 00000000..62909dc0
--- /dev/null
+++ b/ext/3rd-party-addons/website_multi_company_sale/models/__init__.py
@@ -0,0 +1,4 @@
+from . import product_public_category
+from . import sale_order
+from . import product_template
+from . import payment_acquirer
diff --git a/ext/3rd-party-addons/website_multi_company_sale/models/payment_acquirer.py b/ext/3rd-party-addons/website_multi_company_sale/models/payment_acquirer.py
new file mode 100644
index 00000000..d121c383
--- /dev/null
+++ b/ext/3rd-party-addons/website_multi_company_sale/models/payment_acquirer.py
@@ -0,0 +1,20 @@
+from odoo import api, fields, models, _
+from odoo.exceptions import ValidationError
+
+
+class PaymentAcquirer(models.Model):
+    _inherit = 'payment.acquirer'
+
+    website_ids = fields.Many2many('website', string='Allowed websites',
+                                   help='Set the websites this payment acquirer should be available on. Leave empty to allow all.')
+
+    @api.onchange('company_id')
+    def _onchange_company_id(self):
+        return self.company_id and {'domain': {'website_ids': [('company_id', '=', self.company_id.id)]}} or {'domain': {'website_ids': []}}
+
+    @api.constrains('company_id', 'website_ids')
+    def _check_websites_in_company(self):
+        for record in self:
+            website_company = record.website_ids.mapped('company_id')
+            if record.company_id and record.website_ids and (len(website_company) > 1 or website_company[0] != record.company_id):
+                raise ValidationError(_("Error! Only the company's websites are allowed"))
diff --git a/ext/3rd-party-addons/website_multi_company_sale/models/product_public_category.py b/ext/3rd-party-addons/website_multi_company_sale/models/product_public_category.py
new file mode 100644
index 00000000..aba874e8
--- /dev/null
+++ b/ext/3rd-party-addons/website_multi_company_sale/models/product_public_category.py
@@ -0,0 +1,11 @@
+from odoo import models, fields
+
+
+class ProductPublicCategory(models.Model):
+    _inherit = "product.public.category"
+
+    website_ids = fields.Many2many(
+        'website',
+        string="Websites",
+        help="On which websites show category. Keep empty to show at all websites. The value is ignored if there is Parent Category"
+    )
diff --git a/ext/3rd-party-addons/website_multi_company_sale/models/product_template.py b/ext/3rd-party-addons/website_multi_company_sale/models/product_template.py
new file mode 100644
index 00000000..f67a1ebe
--- /dev/null
+++ b/ext/3rd-party-addons/website_multi_company_sale/models/product_template.py
@@ -0,0 +1,22 @@
+
+from odoo import api, fields, models, _
+from odoo.exceptions import ValidationError
+
+
+class ProductTemplate(models.Model):
+    _inherit = "product.template"
+
+    website_ids = fields.Many2many('website', string='Allowed websites',
+                                   help='Set the websites this product should be available on. Leave empty to allow all.')
+
+    @api.onchange('company_id')
+    def _onchange_company_id(self):
+        return self.company_id and {'domain': {'website_ids': [('company_id', '=', self.company_id.id)]}} or {'domain': {'website_ids': []}}
+
+    @api.constrains('company_id', 'website_ids')
+    def _check_websites_in_company(self):
+        for record in self:
+            website_company = record.website_ids.mapped('company_id')
+            if record.company_id and record.website_ids and (len(website_company) > 1 or website_company[0] != record.company_id):
+                raise ValidationError(_("Error! Only the company's websites are allowed. \
+                                        Leave the Company field empty if you want websites from different companies"))
diff --git a/ext/3rd-party-addons/website_multi_company_sale/models/sale_order.py b/ext/3rd-party-addons/website_multi_company_sale/models/sale_order.py
new file mode 100644
index 00000000..d9c11383
--- /dev/null
+++ b/ext/3rd-party-addons/website_multi_company_sale/models/sale_order.py
@@ -0,0 +1,24 @@
+from odoo import models, api, fields
+from odoo.http import request
+
+
+class Website(models.Model):
+    _inherit = 'website'
+
+    @api.multi
+    def sale_get_order(self, force_create=False, code=None, update_pricelist=False, force_pricelist=False):
+        company = request.website.company_id
+        if not request.session.get('sale_order_id'):
+            # original sale_get_order uses last_website_so_id only when there is
+            # sale_order_id in the session
+
+            # company.id seems to be the same as self.id, but let's use variant
+            # from original sale_get_order
+            self = self.with_context(force_company=company.id)
+        return super(Website, self).sale_get_order(force_create, code, update_pricelist, force_pricelist)
+
+
+class ResPartner(models.Model):
+    _inherit = 'res.partner'
+
+    last_website_so_id = fields.Many2one(company_dependent=True)
diff --git a/ext/3rd-party-addons/website_multi_company_sale/security/website_multi_company_sale_security.xml b/ext/3rd-party-addons/website_multi_company_sale/security/website_multi_company_sale_security.xml
new file mode 100644
index 00000000..201f0330
--- /dev/null
+++ b/ext/3rd-party-addons/website_multi_company_sale/security/website_multi_company_sale_security.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+  <record id="website_multi_company_sale_rule_all" model="ir.rule">
+    <field name="name">Products available only for specifed websites (shops)</field>
+    <field name="model_id" ref="model_product_template"/>
+    <field name="domain_force">['|', ('website_ids', 'in', [website_id]), ('website_ids', '=', False)]</field>
+  </record>
+  <record id="website_multi_company_payment_rule_all" model="ir.rule">
+    <field name="name">Payment acquirers available only for specifed websites (shops)</field>
+    <field name="model_id" ref="model_payment_acquirer"/>
+    <field name="domain_force">['|', ('website_ids', 'in', [website_id]), ('website_ids', '=', False)]</field>
+  </record>
+</odoo>
diff --git a/ext/3rd-party-addons/website_multi_company_sale/static/description/icon.png b/ext/3rd-party-addons/website_multi_company_sale/static/description/icon.png
new file mode 100644
index 00000000..213cccf5
Binary files /dev/null and b/ext/3rd-party-addons/website_multi_company_sale/static/description/icon.png differ
diff --git a/ext/3rd-party-addons/website_multi_company_sale/static/description/index.html b/ext/3rd-party-addons/website_multi_company_sale/static/description/index.html
new file mode 100644
index 00000000..dbd32caa
--- /dev/null
+++ b/ext/3rd-party-addons/website_multi_company_sale/static/description/index.html
@@ -0,0 +1,92 @@
+<section class="oe_container">
+    <div class="oe_row oe_spaced">
+        <div class="oe_span12">
+            <h2 class="oe_slogan" style="color:#875A7B;">Real Multi Website (eCommerce extension)</h2>
+        </div>
+    </div>
+</section>
+
+<section class="oe_container">
+  <div class="oe_row oe_spaced">
+    <div class="oe_span12">
+
+    <div class="alert alert-info oe_mt32" style="padding:0.3em 0.6em; font-size: 150%;">
+      <i class="fa fa-hand-o-right"></i><b> Key features: </b>
+      <ul class="list-unstyled">
+
+        <li>
+        <i class="fa fa-check-square-o text-primary"></i>
+          All features of <a href="https://apps.odoo.com/apps/modules/11.0/website_multi_company">Real Multi Website</a> module
+        </li>
+
+        <li>
+        <i class="fa fa-check-square-o text-primary"></i>
+           Each eCommerce has configurable list of product categories
+        </li>
+        <li>
+        <i class="fa fa-check-square-o text-primary"></i>
+           eCommerce carts are separate per each company to avoid accounting problems
+        </li>
+        <li>
+        <i class="fa fa-check-square-o text-primary"></i>
+           The same product can be available on several websites (shops)
+        </li>
+
+      </ul>
+    </div>
+
+    </div>
+  </div>
+</section>
+
+<section class="oe_container">
+    <div class="oe_row oe_spaced">
+        <div class="oe_span8">
+            <h2>Need our service?</h2>
+            <p class="oe_mt32">Contact us by <a href="mailto:apps@it-projects.info">email</a> or fill out <a href="https://www.it-projects.info/page/website.contactus " target="_blank">request form</a></p>
+            <ul>
+                <li><a href="mailto:apps@it-projects.info">apps@it-projects.info <i class="fa fa-envelope-o"></i></a></li>
+                <li><a href="https://www.it-projects.info/page/website.contactus " target="_blank">https://www.it-projects.info/page/website.contactus <i class="fa fa-list-alt"></i></a></li>
+            </ul>
+        </div>
+        <div class="oe_span4">
+            <div class="stamp" style="width:200px;">
+                <div style="margin-top: 15px;
+                            position: relative;
+                            font-family:'Vollkorn', serif;
+                            font-size: 16px;
+                            line-height: 25px;
+                            text-transform: uppercase;
+                            font-weight: bold;
+                            color: #75526b;
+                            border: 3px dashed #75526b;
+                            float: left;
+                            padding: 4px 12px;
+                            -webkit-transform: rotate(7deg);
+                            -o-transform: rotate(7deg);
+                            -moz-transform: rotate(7deg);
+                            -ms-transform: rotate(7deg);">
+                    Tested on Odoo<br/>11.0 community
+                </div>
+                <div style="margin-top: 15px;
+                            position: relative;
+                            font-family:'Vollkorn', serif;
+                            font-size: 16px;
+                            line-height: 25px;
+                            text-transform: uppercase;
+                            font-weight: bold;
+                            color: #75526b;
+                            border: 3px dashed #75526b;
+                            float: left;
+                            padding: 4px 12px;
+                            -webkit-transform: rotate(-3deg);
+                            -o-transform: rotate(-3deg);
+                            -moz-transform: rotate(-3deg);
+                            -ms-transform: rotate(-3deg);">
+                    Tested on Odoo<br/>11.0 enterprise
+                </div>
+            </div>
+        </div>
+    </div>
+</section>
+
diff --git a/ext/3rd-party-addons/website_multi_company_sale/views/payment_views.xml b/ext/3rd-party-addons/website_multi_company_sale/views/payment_views.xml
new file mode 100644
index 00000000..7e521ec5
--- /dev/null
+++ b/ext/3rd-party-addons/website_multi_company_sale/views/payment_views.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+  <record id="acquirer_form_view_inherit_website_multi_company_sale" model="ir.ui.view">
+    <field name="name">payment.acquirer.form.inherit.website_multi_company_sale</field>
+    <field name="model">payment.acquirer</field>
+    <field name="inherit_id" ref="payment.acquirer_form"/>
+    <field name="arch" type="xml">
+      <xpath expr="//field[@name='company_id']" position="after">
+        <field name="website_ids" widget="many2many_tags" domain="company_id and [('company_id', '=', company_id)] or []"/>
+      </xpath>
+    </field>
+  </record>
+</odoo>
+
diff --git a/ext/3rd-party-addons/website_multi_company_sale/views/product_public_category_views.xml b/ext/3rd-party-addons/website_multi_company_sale/views/product_public_category_views.xml
new file mode 100644
index 00000000..8e6a1397
--- /dev/null
+++ b/ext/3rd-party-addons/website_multi_company_sale/views/product_public_category_views.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+
+    <record id="product_public_category_form_view" model="ir.ui.view">
+        <field name="name">product.public.category.form</field>
+        <field name="model">product.public.category</field>
+        <field name="inherit_id" ref="website_sale.product_public_category_form_view"/>
+        <field name="arch" type="xml">
+            <xpath expr="//field[@name='sequence']" position="after">
+                <field name="website_ids" widget="many2many_tags" attrs="{'readonly': [('parent_id', '!=', False)]}"/>
+            </xpath>
+        </field>
+    </record>
+
+    <record id="product_public_category_tree_view" model="ir.ui.view">
+        <field name="name">product.public.category.tree</field>
+        <field name="model">product.public.category</field>
+        <field name="inherit_id" ref="website_sale.product_public_category_tree_view"/>
+        <field name="arch" type="xml">
+            <xpath expr="//field[@name='display_name']" position="after">
+                <field name="website_ids" widget="many2many_tags"/>
+            </xpath>
+        </field>
+    </record>
+
+</odoo>
diff --git a/ext/3rd-party-addons/website_multi_company_sale/views/product_template_views.xml b/ext/3rd-party-addons/website_multi_company_sale/views/product_template_views.xml
new file mode 100644
index 00000000..71819d87
--- /dev/null
+++ b/ext/3rd-party-addons/website_multi_company_sale/views/product_template_views.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+  <record id="product_template_form_view_inherit_website_multi_comapny_sale" model="ir.ui.view">
+    <field name="name">product.template.form.inherit.website_multi_company_sale</field>
+    <field name="model">product.template</field>
+    <field name="inherit_id" ref="product.product_template_form_view"/>
+    <field name="arch" type="xml">
+      <xpath expr="//field[@name='company_id']" position="after">
+          <field name="website_ids" widget="many2many_tags" domain="company_id and [('company_id', '=', company_id)] or []"/>
+      </xpath>
+    </field>
+  </record>
+</odoo>
diff --git a/ext/3rd-party-addons/website_multi_company_sale/views/website_views.xml b/ext/3rd-party-addons/website_multi_company_sale/views/website_views.xml
new file mode 100644
index 00000000..3f7ce963
--- /dev/null
+++ b/ext/3rd-party-addons/website_multi_company_sale/views/website_views.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+
+    <record id="view_website_multi_company_form" model="ir.ui.view">
+        <field name="model">website</field>
+        <field name="inherit_id" ref="website_multi_company.view_website_multi_company_form"/>
+        <field name="arch" type="xml">
+            <xpath expr="//div[@name='shop']" position="inside">
+                <group string="Assignation of online orders">
+                    <field name="salesperson_id"/>
+                    <field name="salesteam_id"/>
+                </group>
+            </xpath>
+        </field>
+    </record>
+
+</odoo>