Morpho QuickPanorama is a very good camera application for Nokia N900. It makes your Nokia N900 a 360 degree camera for 360 degree shots and Panaromic shots. This app stiches every shot and give you a better result.
You can find this app on Ovi Store QuickPanorama. It is a demo version that’s limited to a capture size of VGA (640 x 480).