Today we've just released JIRA 5.2 RC 4.

Highlights in JIRA 5.2 RC 4:

• New Issue Navigator!
• Workflow scheme viewer
• Making getting started much easier
• JIRA Webhooks for Issues
• And much, much more... 

Read all about them on our JIRA 5.2 RC 4 (m11) Release Notes
We do not recommend you use any EAP/RC in production as they are not supported, so please use them in a testing environment.

Please note Release Candidates Two and Three were not made publicly available.

You can download the latest EAP/RC from here.