We have just launched an online demo of Jitbit's Web-based Help-Desk software. Use "admin/admin" to log in as an administrator, or "client/client" to log in as a regular user.
I just realized, that when I choose a web-app or a component for myself, I never even look at the ones that have no online demos. Offering a server-side product as a download only, is not a good idea since few system administrators will ever install something on their production server for evaluation purposes.
Also, check out the video walkthrough we made:
by Alex. CEO, founder