Nimue is the name of the fifth major post-release free expansion for the MMO Albion Online, it sounds like a pretty good one too.
Adding some really useful additions this time, like a party finder so those without in-game friends can find people to play with, new monsters roaming the open world for PvE and special drops, a brand-new 5v5 guild-versus-guild arena, guild logos can now be adjusted, more NPCs have full voice-over lines, much longer chat history and so on. It's quite a packed update and looks to continue taking the game in an interesting direction.
Looks like they've cleaned up the launcher a little on Linux too. I remember before having issues with it requiring some little fixes. After downloading a completely fresh install (with configs wiped too) on Ubuntu 18.10 it worked perfectly—good stuff.
I'm quite excited about what they have planned next, with randomised dungeons which should make PvE a lot more interesting—something that has been sorely needed for some time. I really do hope they have more PvE planned, still far too PvP focused for me personally.