A number of companies support the hosting and developent of Mule for gratis! Big thanks goes out for these guys, please check them out, they are awesome to work with!

MuleSource - MuleSource is the company behind Mule.

Codehaus - Rock solid project hosting for years! Cheers guys

Atlassian - Free JIRA license for the best issue tracking.

ALM Works - Site license for the best client for the best issue tracking system. Available for committers as well as all Mule community. Download this license file for activation. Intellij IDEA users should also look no further than TrackLink plugin from the same folks, which integrates JIRAClient and IDEA (much like what Mylyn provides for Eclipse). Uses the same license.

JetBrains - IntelliJ licenses for committers.

Zeroturnaround - JavaRebel licenses for committers.

YourKit - Java Profiler licenses for core committers.

Atlassian - Clover, Fisheye, Crucible, JIRA, Confluence, Bamboo, Crowd licenses

Adaptavist - Free Builder theme used to customise this wiki