One of the main projects here on Strange Stones has been the Demons Of Adad Untash, a “pantheon” of otherworldly nasties for Labyrinth Lord/Advanced Edition Companion. As with all things retroclone, you should have no trouble using these demons with pretty much any other old school renaissance game.
So, without further ado, here are the Demons Of Adad Untash, linked in such as way as to minimize your need to hunt through pages and pages of junk to find them:
If you wind up using any of these in your games I’d love to hear about it. Please consider dropping a note in the comments to let me (and the whole wide world) know how your players fare against my pets.