Small tools that do one job well
Thimblewright makes small, focused add-ons for the software teams already use. Each one does a single job, runs inside the platform it extends, and keeps out of your data.
DateSync for Jira
Keeps each parent's start and due dates in step with its children: Epics, Tasks and the levels above, written to the real fields. Read more.
DateSync is not on the Atlassian Marketplace yet. This page will link to the listing once it is approved.