Pano
Great app for taking panoramic photos, the app “stitches” together images providing you with handy overlap (onion skin) views
ProCamera
Includes helpful guides when taking photos, as well as ability to zoom optically. Supports video capture also.
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Genius
Provides guides, anti-shake, timer, burst mode, manual adjustment settings, and more for photo capture
Action Camera
Uses a burst setting to capture 4 sequential images, which are put into a nice 2 x 2 collage
Sfera
Creates outstanding panoramas and publishes them to the web so they are browseable (you can move around in them)
Supports image capture, basic filters, and easy upload / sharing right from the app
