I finally updated my old addon
DPSMeter to work in 3.1! Haven't been working on it since... 2.4? so I wanted to get it to work again. The code is not very clean but it works, and now I'm going to start updating it again.
I also uploaded my other small addon which I made for myself a while ago,
MusicButler. It doesn't have much features yet, but maybe later it will. Some other stuff might be also coming soon.