[slondr]

I'm a big Barrier user, which has no Wayland equivalent. I also frequently make use of X tunelling over SSH, which had no Wayland equivalent the last time I checked, although it has been a year or so since the last time I looked into it.

[neurostimulant]

Synergy (the one Barrier forked from) seems to have wayland support on their beta release. It's not free though.

[Rondom]

Input Leap has wayland support as well. https://github.com/input-leap/input-leap