Slack Jira Integration - Easily keep issues moving right from Slack
Agile Docs - Interact with Jira like a Google Doc
InVision + JIRA - Pair an InVision prototype with any JIRA issue
66Analytics - Self-hosted analytics, heatmaps & session recordings.
JXL for Jira - The power of Jira with the familiarity of spreadsheets
Pathfix - The easiest way to add integrations to your SaaS