From Awesome Software:
JIRA Pal gives you an instant view of your JIRA isues right on your desktop. Keeping track of your JIRA issues used to be a full-time job all by itself, but no more! JIRA Pal keeps you up-to-date without constantly interrupting you, and it's instantly accessible.
Keeps you up to date without interrupting
Any updates that are found by JIRA Pal's automatic sync are summarized in a growl update, unobtrusively shown on your screen. There is no need to switch programs, constantly watch your inbox, or stop what you are doing.
JIRA Pal checks for new updates every two minutes, automatically.
Issues about (for example) your garage renovation are automatically kept separate from issues regarding the new login page workflow.
JIRA Pal keeps itself up to date, so you can always have the latest version without having to visit this page to get it.