Percolator for iPhone and iPad

Percolator is not only a lot of fun, it produces some really interesting and artistic images.

Storie: Holiday Edition for iPhone and iPad

Updated for the holiday season, Storie offers a mix of photo effects and sharing techniques.

Dramatic Black & White for iPhone and iPad

Both the iPhone and iPad versions of this image editor produced some excellent black and white images.

Photo Academy for iPhone

Photo Academy provides a wealth of photographic information in your pocket.

Simply B&W for iPhone

Simply B&W is a no-frills black-and-white image editing app that produces good-looking photos.

Tracks for iPhone

Tracks, from Tracks Media, is a photo sharing app that hopes to be your new hub for social photography, yet the app lacks social integration.

Photogram for iPhone

Photogram lets you share a neat little postcard package of pictures through Facebook, Twitter, or an email.

Five low- or no-cost iPhone image editors

The App Store is loaded with a number of great third-party apps to help you make the most of your mobile photos. And many of these filters will cost you very little -- or nothing at all. Jeff Phillips looks at five free (or nearly free) image editors.

Photodream for iPhone

This image editor lets you insert effects -- sunglasses, necklaces, and more -- over photos stored on your iOS device. The fun wears off pretty quickly.

PhotoCaddy for iPhone

No matter the situation or setting, this reference app offers a wealth of advice for photographers, with tips and suggested settings that are concise and easy to find.

Stick It for iPhone

This memo app -- which you can use to create a note that appears on your iPhone's lock screen -- can be a limited tool, it's still a worthwhile capability to have for handy reminders.

You Gotta See This for iPhone

This app, which uses the gyroscope in the iPhone 4 to help create a panoramic-style view, has a few shortcomings. But it's a fun app to use and a great way to show off to friends.

TouchOfColor for iPhone

This app attempts to help you accent colors in your mobile images, and while its results are decent, this may be an image-editing activity that's better suited for another device.

Today Todo Pro for iPhone

This good-looking task manager may take some adjustment if you're accustomed to more traditional planning. But if something fresh will help keep you on track, this app may be worth a try.

TiltShift Generator for iPhone

When looking to make a simple snapshot into art, the iPhone and iPod touch tool many photographers turn to is TiltShift Generator -- and for good reason. The app is a lot of fun and a worthy addition to your iPhone photobag.