I'm combining the following lists
JCR (Jurek's Chess Ratings)
SWCR (Frank's Chess Page)
CCRL -300 (Computer Chess Rating Lists, minus 300 points)
CEGT -250 (Computer Engines Grand Tourney minus 250 points)
IPON's Rating List
Other credible sources such as SedatChess or TOP10, mainly for the ippolit-based engines.
There will obviously be descripencies in the list, but I've tried to make it as close to the engines' true strength as possible. I will release it when finished.