Welcome to qhimm's forums!
The wiki doesn't have a list of mods. It does have tools and patches for you to make your own mods, though.
Ficedula's website is here: http://www.ficedula.co.uk/
He's got a lot of tools. LGPtools is one of the mainly needed ones, but it might be obsoleted soon if Aali continues work on his extractor/compressor.
Most non-graphical mods will edit the flevel.lgp, scene.bin and/or KERNEL.bin/kernel2.bin files (Squall78 and I dominate these files in terms of editors). The graphical ones will likely modify char.lgp and/or magic.lgp. Character portraits are in the menu_xx.lgp file (depending on your language).
Definitely check out dziugo's YAMP
and look for my MDef fix on page 7 of that topic.