I'll kick this off Snapseed - Editing. Particularly like the local contrast and new HDR Landscape features The Photographers Ephemeris - I use this regularly when taking landscapes. Great for working out where best to be for sunrise/sunset Instagram - Needs no explanation 645 Pro - some excellent 'manual' camera features, plus the option to save TIFF files and very low compression JPEG images Lightning Cam - yet to work successfully, but it takes a few images every second and look for a bright streak in the sky before dumping the image one at a time. Basically it videos and drops any still frames in which it doesn't detect lightning. If I ever find myself in a thunderstorm i intend to make full use of this app! Photoshop Touch - Get this app! really good cut-down version of photoshop that produces excellent images KitCam - sadly now discontinued after Yahoo! purchased the developer. Has loads and loads of different features, including Timelpase photography and some 'film' style effects Camera360 - bit like Kit Cam. Some nice effects. The Android version also works with the recent Sony QX cameras. Lapse It - I use this for producing timelapse videos/stills. All teh features you need.