Atom Protocol Exerciser
Ouch! The Ape has some horrible bug that keeps bringing tbray.org to its knees, and I'm too busy to fix it until March 23rd. You can install a local Ape and run it just fine; see The Ape meets RubyGems.
The Ape will be back here before April Fools' Day. If this is creating a horrible problem, contact me, tim dot bray at sun dot com, and maybe I can help.
Ape Logo by Greg Borenstein.