Migrating from Odoo 19 to Odoo 20: which OCA modules are available

When a course is sold and the order is confirmed, Odoo automatically links the sales order line to the matching course participation, so you can see which sale brought each enrollment.

Customers can see the courses their company has bought from the portal, check how many seats are used or left, and copy an invitation link to share a course with colleagues.

Lets each participant of a course bought with several seats take their own certification survey independently, and shows the participant's name, email and phone on their survey answers and certificate.

In the online shop, product availability messages and purchase limits are based on the 'Available to promise' quantity instead of the 'Free to use' quantity, so customers see and can buy only what is truly available.

Shows stock availability directly on product cards in the website shop list, so shoppers see 'Out of Stock' or 'Only X left in stock' before opening a product page.

Adds a Shipping Policy choice to the eCommerce checkout so customers can pick how their order is delivered, and updates the cart and estimated delivery date right away.

Shows available stock for each variant directly inside the eCommerce product matrix, and hides the quantity selector for combinations that are out of stock when backorders are not allowed.

Lets you show the next incoming stock date on your online shop product page when a product is out of stock, so customers know when it will be available again.

Lets you choose, per customer or company, whether website prices show tax included or tax excluded, instead of using one global website setting.

Lets online shoppers buy decimal quantities of products sold by weight, volume or length (kg, L, m) on your website, while products sold by units stay whole numbers.

Lets website managers display product variant fields (and more field types) in the shop product page extra fields block, with values that refresh live when the customer switches variant.

Makes the VAT number mandatory in the Odoo e-commerce checkout billing address, so customers cannot complete an order without entering it.

Extends the wishlist page so that prices and purchase buttons are hidden for products marked as price-hidden, matching the behaviour already applied on the shop pages.

Restores the 'Add product to my cart but keep it in my wishlist' checkbox on the website wishlist page and remembers the choice, so products stay in the wishlist after being added to the cart.

Adds a "Big Buttons" block you can drop onto any website page. It shows two large coloured buttons with icons and text, and you can set where each button links.

Adds a new "Marginless Gallery" building block to the website editor, letting you drop a grid of images and text blocks that sit edge to edge with no gaps between them.

Adds a new website building block that displays a tree of e-commerce product categories. You choose which categories appear and on which websites.