Jira Gantt Chart gives you several different Gantt Charts implementations as gadgets, project, version and issue tabs.
Risk Management for Jira provides risk management functionality.
Keep everybody on their toes by enabling JIRA with advanced and highly customizeable Service Level Agreements
Show Saved Filter With Columns for Jira Add On extends the regular Filter Results gadget.
JIRA Time Tracking Reporting Collection is a set of reports and portlets presenting time tracking data. More than 50 different portlets and reports. Export to Excel. Track time for users, groups, projects, components, issue types, priorities, or ?