Multi Patcher is a Patch Engine which is able to patch any kind of file and make registry changes. It is also possible to create/add your own patches which then can be distributed as a separate .TBR file. This .TBR file can then be appended to the existing patch database. Multi Patcher has a very good windows GUI and it is the follow-up to X-Brain which was DOS based.
The MultiPatch.EXE is the actual Patch Engine and SaveData.EXE is the Patch Creator.