I have one main app atm. (Of course there's hippstr which launch date seems to always be next month :P, so I won't include it here.)
That one app being stikked, http://www.stikked.com. It's a pretty good pastebin, I really wrote it to create an example app for my php framework, http://codeigniter.com. But I took it beyond that, now it has a lot of cool features. And is a very worthy competitor to hak5's 'true love', slexy... Check it out! Oh and it's open source (the OS version is a little behind, but will be updated soon) at http://code.google.com/p/stikked
Crashanddie and I were also working on a cool prime number finding application, I might release that soon.