KWin-lowlatency
this is a patched version of KWin, which aims to reduce latency and fix some fundamental problems with it, such as stuttering.
releases
Arch Linux (v5.23.5, AUR)
Gentoo (v5.20.5, overlay; see pull request for v5.22.5)
openSUSE Leap and Tumbleweed (v5.23.3/v5.18.8, OBS)
other Linux (v5.23.5, patch file) (source tar)