Comment 3 for bug 459654

Now that evolution-couchdb supports contacts, it should be pretty easy to add calendar and tasks support, and we indeed plan to do so soon, although it would need, as Clemens says, an interface on the web UI.

evolution-couchdb code is GPL, and I more than welcome contributions to write a calendar/tasks backend, and I will even offer assistance, so if someone wants to work on it, just let me know. If not, I'll start working on it very soon