I have compiled a list of Ubercart 3 compatible modules. I haven't gone through the tested all the module as thats a huge task. Also please beware the some of these might be in dev status and not fully functional or just being ported.
If you notice any missing modules please edit this page and add it in.
- Adyen Ubercart Payment
This module provides an Ubercart payment method to embed the payment services provided by Adyen
The agreservations-module is a module to handle reservations of resources.
- Ajax Blocks
Permits to load some blocks by additional AJAX request after loading the whole cached page when the page is viewed by anonymous user.
Alipay is a popular Chinese payment gateway. This module provides support for it. Ubercart required.