Here's a tool I've been working on for the last few months, that ought to now be polished enough to release. It lets you issue mouse clicks with gentle mouth sounds.
If you have some RSI coming on, it's best to stop it early - but if a tool is even slightly frustrating, you're going to gravitate back to the mouse. So, the goal is to be extremely smooth and robust. "It's better than not being able to use a mouse at all" is nowhere near good enough; the bar Clickitongue is trying to clear is "an expert user doesn't feel inconvenienced at all vs using their fingers". And I think it clears that bar! (Let's hope I'm not jinxing things too badly here lol)
So, if you or anyone you know gets wrist pain, or has anything more serious impeding use of their fingers, I really hope this can help! I'll be happy to answer any questions, and investigate any problems.
(Linux (both X and Wayland), Windows, and OSX are all supported).