The praxis look and feel.
Based on the praxis code available https://code.google.com/p/praxis/source/browse .
I mavenized the code, separated the icons in the resources package. To use in conjuncion with netbeans, compile, put the jar somewhere, and execute netbeans with the following commandline:
netbeans -cp:p <path to your praxis jar> --laf PraxisLookAndFeel
Here's a screenshot with netbeans 7.4 running praxislaf, with Monster2 theme: