One-Handed Linux?

YACC (or "Yet Another Anonymous Coward") asks: "One of my hands is disabled and I am trying to switch to Linux. Windows has a slew of utilities that can remap one side of the keyboard to the other, make the shift keys "sticky," etc. I was wondering if anything comperable exists for Linux/XFree86. Any help would be appreciated. " If something like this can be done with the exist tools, please post the details.