Some format specifications have been published, from the Camelot Systems site. For now, it is only four DAT files from StarCraft, and the Unit data DAT file from WarCraft II.
The plan is to let the collection of formats grow, hopefully to be of pretty much all modding-relevant files. The specifications are available on the Format specifications page.
Digging through my files, I found some modding software from the old Camelot Systems days, some 25 years ago. While CamSys was mainly focused on StarCraft and WarCraft II, they also made some software for other, non-Blizzard games:
While these are not games I myself ever played, I suppose they might as well be uploaded here as they once briefly were on the CamSys website. The respective modding communities of these games (of which I know nothing) have presumably long since superceded these with other tools, but I thought it would be fun to upload these here anyway as a little digital library.