I found this great article about “Best Photo Apps for iPad and iPhone”
Filterstorm
Filterstorm’s unique touch interface makes it intuitive, easy and fun to use. The versatile and varied set of tools for editing photos includes powerful masking tools, that give you the ability to apply any of the filters by brush, color range, and gradient, as well as to the entire image. Selectively adjust your photo by painting on your adjustments. Filterstorm includes in-app video tutorials.
Platforms
iPad and iPhone.
Photogene
Intuitive and easy to use to edit, enhance and share your photos on the go. Professional editing tools. Photogene is an excellent everyday photo editor.
Platforms
For iPad and iPhone.
PhotoForge
PhotoForge is a digital darkroom with an impressive range of tools; image manipulation, painting, retouching, effects, and color correction.
PhotoForge is available for iPad and iPhone.
Platforms
For iPad and iPhone.
Adobe Photoshop Express
Platforms
iPhone, iPad and Android.
MOBILE PHOTO EFFECTS
Pano
Take beautiful, seamless panoramic photos directly from your mobile device. Pano‘s handy semi-transparent guide helps you line up all your shots perfectly. 360 degree panorama images.
Platforms
Android, iOS and Windows Phone 7.
QuadCamera
4-8 serial shoots are taken in sequence by the iPhone’s camera, then composed into a single shareable image with six selectable effects. QuadCamera is one of many toy apps by Takayuki Fukatsu that allow you to do fun and artistic things with the iPhone’s built-in camera.
Platforms
iPhone
TiltShift Generator
Create more dramatic-looking images, focused only on one spot. Processes your photos with blur, color, and brightness to apply radical depth-of-field effects. With TiltShift Generator you can make even flat cell phone images look like DSLR-quality shots with depth of field.
Platforms
iPhone & iPad
ARTISTIC VINTAGE FILTER EFFECTS
CameraBag
Recreate the magic of film by emulating photography’s most beloved and iconic vintage cameras, film, and processing techniques. Effects can be stacked. CameraBag is easy to use with an intuitive, simple interface.
Platforms
iPhone, iPad, Windows and Mac.
lo-mob
Retro lo-fi and photographic experiments on your iPhone. Select or snap a photo and lo-mob immediately generates a list of previews of all the different effects. Pick the one you want, tweak it if you like, and save or share your photo via e-mail as well as through a range of social media services.
Platforms
iPhone and Windows Phone 7.
PictureShow
Choose between 37 analog presets or mix your own style with frames, light leaks, noise and vignetting. Features lens kit, random shuffle effects and social photo sharing. Find your own style and save it as a PictureShow recipe.
Platforms
iPhone
Plastic Bullet
Randomly generates the look of many combinations of cameras, lenses and films turning your photos into gloriously unpredictable works of art. A true electronic lomography app that encourages you to explore the “happy accidents” of your photography. Share directly to Facebook, Twitter, Tumblr and Flickr. Plastic Bullet gives you instant, high quality results.
Platforms
iOS devices and Mac OSX.
Film Lab
Recreate the look of analog film stocks with Film Lab’s impressive set of film and film styles from brands like Ilford, Kodak, AGFA, Calotype, FORTE, GAF, Polachrome, Rollei and Fuji. Transform your iPhone into a film camera with Film Lab.
Platforms
iPhone
FX Photo Studio
Tons of effects that can be stacked on each other, combined, randomised and saved as new presets. FX Photos Studio includes basic photo editing like cropping, rotating, flipping, as well as social photo sharing.
Platforms
iOS devices and Mac OS X.
Hipstamatic
Hipstamatic brings back the look, feel, unpredictable beauty, and fun of plastic toy cameras from the past. Swap between a variety of camera components, film, lenses, and flashes, for a variety of different looks and styles. Beautiful.
Platforms
iPhone
Instagram offers a selection of vintage inspired filters and borders but what really sets this app apart is its focus on social media and photo sharing. Easily share photos through Facebook, Flickr, Tumblr, Foursquare and Twitter. Get started in no time with this Guide to Instagram.
Sources: http://www.marmalademoon.com
