[Tex/LaTex] A big list of every keyval package

big-listkey-valuexkeyval

I lose track of all the different keyval packages. Can we maintain a list here? (Community wiki, one package per answer with a brief description of scope. I've started things off but need help completing it.)

Best Answer

pgfkeys.sty, part of PGF/TikZ

Author: Till Tantau