I use it with an IRC client. There are some things I take issue with (mainly stripping out IRC color control characters), but it works really nicely as a client. I use Irssi so if I need to ignore it, I can tuck it nicely away in a screen session somewhere and put my focus elsewhere.
A couple years ago, I decided to setup a MediaWiki installation, and found it works well enough for storing thoughts/ideas/things. I added another sort of 'navigation' layer that makes sense in my head, and wrote a desktop app in python to use my navigation layer instead of the links. Eventually I would like to set it up to scan for links in the various pages, download the content then add it to a job queue to be parsed into a more concise format for the wiki itself.
I don't use it nearly as much as I should... it's one of those things that's 90% what I want, and just missing the last 10%.
I can play the UT2003 native version for linux just fine (doesn't seem to play nice with amdgpu, but the intel driver seems to be fine).