CodeStats
Source code statistics and metrics.
Screenshots showing us: Complexity of Rails libraries, comparison of some Open Source projects and MongoMapper vs Mongoid (You can see actual .html report files in docs).
Installation & Usage
The tool is language-agnostic, but to use it You need Ruby installed, to install type:
gem install code_stats2
Now run it on some of Your projects, You can also specify some options (type 'code_stats' without arguments to see full help):
code_stats /projects/wordpress
code_stats /projects/* --except JavaScript
Also You can easily customize it, sources are small and simple as an egg.
Copyright (c) Alexey Petrushin http://petrush.in, released under the MIT license.