From Rex Chung an a blog entitled Australian Web 2.0 and more

These guys are most well known in the Java community. Their bug tracking system, Jira, is used in most open source Java projects and is very popular across the world. Their wiki software, Confluence, is also very popular and is a leader in wiki functionality and UI design. They received the Deloitte Fast 500 Award earlier this year.

Australian Web 2.0 and more...