It’s not perfect yet, but it’s much, much better than the old days.

OMEMO is supported by every major client, and they interoperate successfully. Unfortunately, most clients are stuck with an older version of the OMEMO spec. It’s not ideal, but it doesn’t cause any practical issue, unless you use Kaidan or UWPX, which only support the latest version.

All popular clients and servers support retrieving chat history now too.

In practice, I’ve been using it for several months to chat with friends and family, and haven’t had any issues.

Perfect, now you just have to wrap your program inside a debugger in production!

My favourites are:

• Endless Sky (2D space sim, singleplayer)
• FlightGear (3D flight sim, singleplayer and multiplayer)
• OpenTTD (transport management game, singleplayer and multiplayer)
• Torcs (racing game, singleplayer)

Each of these are quite polished (especially for open source games!), widely packaged, not too complicated to start playing (except perhaps FlightGear) and have been around for a long time. Endless Sky, FlightGear and OpenTTD have quite active development, while Torcs is much quieter nowadays (although there is an actively developed fork called Speed Dreams which is awesome, just not widely packaged yet).

I’ve been meaning to try out FreeOrion and Minetest for a while now, looking forward to seeing what else pops up on the thread!