Easy open source. We value high code quality, we value pragmatic licenses, we value keeping our code clean, we value embracing contributors, we value high quality documentation, we value easiness in applications and APIs and we value listening to users.
Thanks to Atlassian for JIRA, zutubi for Pulse, cenqua for Clover and FishEye.
Also thanks to those excellent open source libraries we use, like TestNG, EasyMock and others.