I'm constantly playing with this and that app. Some stay a day and some last for years.
One's that have stood the test of time are Windowblinds (for changing the look of Windows) and Multiplicity (for sharing keyboard and mouse across computers).
Some that are still being evaluated are ObjectDock and ObjectBar that replace the Windows start button and taskbar and SketchUp (a CAD-type app). I think SketchUp is OK, but I have no real use for it and it's on it's way out.
The new favorites are meebo.com and Pandora.
Meebo.com acts as a chat client that uses the GAIM engine on their servers. This allows me to chat to whomever I like at work where they block the popular chat client ports and servers. It might not be long before the company blocks the meebo.com domain but it's still an interesting use of AJAX and open source to fill a niche.
Pandora is a music service that lets you set up stations based on artists or song and then plays music that is similar. You can refine your stations by rating the songs that play or adding other songs and /or artists. If you want to hear any of my stations you can hit one of the links in the sidebar here. They have 400,000 songs in their library now and appear to be constantly adding more. A friend of mine, David Roman, has built a DesktopX interface instead of a full browser; very nice, very cool.
I was playing with ArtRage2 trial about a month ago. It's a very nice painting application that I'll try to purchase if I don't win it in the contest I entered (not looking good there).
