The Corewar Benchmarks
The first published Benchmark containing 12 warriors. It's now a bit out of date.
An improved version of the Wilkies Benchmark containing 13 warriors.
A newer and much tougher Benchmark containing 12 warriors. A good startingpoint for beginners to test their warriors.
My own Benchmark containing 12 state-of-the-art warriors.
The comprehensive warrior optimizing tool (written in Perl) contains also several larger Benchmarks.