OpenChess

LittleBlitzer is a free Windows tournament manager program for UCI based chess engines. It was created to enable playing thousands of very fast games using multiple threads for chess engine testing purposes. It creates a PGN file designed to be used by Bayeselo or Elostat to give a final rating for each chess engine. It is useful for both chess programmers and chess testers as you can run tens of thousands of games at fast time controls in a fraction of the time you could with a traditional GUI interface.

http://kimiensoftware.com/software/chess/littleblitzer