Congratulations to Atlassian - the Aussie company specializing in collaboration and development tools for developers - on the public release of JIRA 4. Out of beta and into prime time!
The Atlassian Plugin Exchange is the largest plugin ecosystem of its kind, and earlier this summer we released an open source JIRA/Zendesk integration on the Plugin Exchange. The integration creates JIRA issues based on Zendesk tickets, and keeps the communication on the two in sync by transferring comments back and forth.
Our integration was described by the Atlassian team as delicious peanut butter and jelly sandwich - a combo that just makes sense!
We're continuing to extend the integration, now with public and private comments and support for pushing attachments from JIRA to Zendesk. You can check out the integration on Atlassian's plugin Exchange.