Flog lets you measure the complexity of your ruby code

If you're interested in flog but disagree with Ryan's scoring of various constructs, check out the self-flagellation gem: http://github.com/bscofield/self-flagellation/tree/master

With it, you can specify score profiles in a YAML file. We've also got a website in the works that will allow people to share score profiles for various types of code (for a Rails app, for a test suite, etc.)

This uses the ABC Metric: http://c2.com/cgi/wiki?AbcMetric

Does anyone know of other metrics to measure code complexity?