Have a look at the awesome plugins from J-Tricks

Both Commercial and Free!

Looking for JIRA Tips or sample code? How about some AJS tricks? Or Remote APIs?

All of that and some more - JIRA Tutorials

Want to learn JIRA Plugin Development in detail?

Look no farther than JIRA Development Cookbook(s)
by Jobin Kuruvilla

Looking to customize JIRA or need professional help with JIRA Configurations or Plugins?

Interested in integrations with other ALM suits?

Meet Go2Group, an Atlassian Platinum Expert