JIRA Client Lite is a free desktop front-end for 10-user Starter
edition of Atlassian JIRA issue tracking system. It boosts your
productivity with an interactive interface, enables greater mobility
with its offline mode, and has many useful features such as smart
search, time tracking widget, screenshot editor, and others.

Key features:
(a) Interactive desktop interface instead of web access
You don't need to browse through a bunch of web pages to find the
desired information - use a familiar Outlook-like tree view interface.

(b) Offline availability
Whenever you are offline or have a slow VPN connection, you can still
work with your local copy of issues database and synchronize changes
when you become online.

(c) Search queries
JIRA Client supports any combination of search conditions using
Boolean logic. Found issues can be displayed in a hierarchical layout
based on links or sub-tasks.

(d) Capture, edit and attach screenshots to your issues
In addition to just capturing screenshots, you can later edit them:
crop, emphasize an area, provide comments, blur unnecessary
information and zoom out the details.

(e) Track the time you spend on performing your tasks
JIRA Client aggregates the information on the time you spend on your
issues and you can later analyze your workload in a time sheet and
publish it.