

Piper is less than 2MB, and allows reconfiguring Logitech mouse buttons. It’s available in Debian and Ubuntu package managers.
Screenshot:
I had to use Piper to get exotic features like having mouse 6, 7, 8 buttons function as mouse 6, 7, 8, rather than the default of alt-tab and ctrl-v.
I would rather have my good friend bang my spouse while drunk, than drive drunk.