Following are some of the popular add-ons for JIRA :
* Portfolio for JIRA
* JIRA Toolkit Plugin
* JIRA Charting Plugin
* Suites utilities for JIRA
* ScriptRunner for JIRA
* Tempo Timesheets for JIRA
* Atlassian REST API Browser
* JIRA Misc Workflow Extensions
* Zephyr for JIRA – Test Management
