JIRA has built in worklogging, which is a great feature w/ some very nice reporting functionality (I especially like the accuracy and developer reports), but sadly worklogging is done in a separate screen and is rather inconvenient.

This script simplifies work logging for JIRA:
* Tracks the work time for an issue if you're use the 'Start Progress' link
* Adds inline worklog form for 'Stop Progress', prefilled with tracked time
* Resolve/Close display a worklog form, prefilled with any tracking info

This has been tested to work with default templates on JIRA 3.3+, however
due to the nature of the additions (DOM replacements, workflow-based action) you may have to make modifications to the script if you have different workflow IDs or document structure.

A screencam demo is available here: http://randomfoo.net/blog/id/4006