Tool++ is a modification of H2Tool by Kornman00 originally released on Modacity. That download link is dead and this is here to have a mirror. File only seems to change the order in which data is processed. Bitmaps and language packs done before tag names and stringIDs
Modacity post seemed to imply that this was ground work for a different feature unreleated to other features. Physics and collisions compiling were given as examples of things unrelated to this.