EaSynth look and feel is a Synth based look and feel, the name "EaSynth" comes from "Easy Synth", since this look and feel is generated by EaSynth Look And Feel Designer, this can be much easier than creating it manually.
The homepage of EaSynth look and feel is http://www.easynth.com/freewares/EaSynthLookAndFeel.html
EaSynth look and feel and its source code (including the Synth XML, Painter and GraphicsUtils classes source code and look and feel project file) are released under the Apache License 2.0.
EaSynth look and feel is integrated with the EaSynth Look And Feel Designer, and work as the default look and feel. The project file of EaSynth look and feel is delivered with the tool, as a sample project.
Here is a screen shot for EaSynth look and feel: