YourKit.com

YourKit is kindly supporting open source projects with its full-featured Java Profiler.

YourKit, LLC is the creator of innovative and intelligent tools for profiling Java and .NET applications.

Take a look at YourKit's leading software products: YourKit Java Profiler and YourKit .NET Profiler.

zeroturnaround.com

Thanks to the guys from zeroturnaround.com for supporting this project with a open source license of jrebel.