Slack Jira Integration - Easily keep issues moving right from Slack
InVision + JIRA - Pair an InVision prototype with any JIRA issue
Garage by Fueled - Just shake your phone to report bugs directly to Jira
Timeneye - Time Tracking Software for Teams and Freelancers
Agile Docs - Interact with Jira like a Google Doc
JXL for Jira - The power of Jira with the familiarity of spreadsheets