Aviary Phoenix - Advanced Image Editor

Phoenix is a full-featured image editor with layers, masks, effects, undo history, and all that other good stuff found in desktop image editors. All the tools you need to edit your images.

Website: Phoenix by Aviary - Advanced online image editor - http://www.aviary.com/tools/image-editor 
Price: Free
Desktop Alternative Software: Photoshop - Windows Paint - Paint.net - Gimp - Paint Shop..

Aviary Falcon - Image Markup and resize tools.

Use Falcon to crop, resize, or markup images and web pages from your browser or desktop. Ideal for designers, bloggers, and meme enthusiasts.

Website: Aviary Falcon Image Markup - resize, crop and markup images online - http://www.aviary.com/tools/vector-editor
Price: Free
Desktop Alternative Software: Informatik - Image Markup Tool - Snagit ..

Effect Editor (Peacock) - Photo effects creator.

Peacock Effect Editor let you experiment with a wide range of terrains and patterns, or create your own photo effects. You really have to try it out to believe it; there's nothing else quite like it.

Website: Aviary Peacock Effect Editor - Patterns and effects maker.

Photoshop Express - Online photo edit

Photoshop Express is online tools for image editing, create and share photos online with free 2GB storage.

Website: Photoshop Express - Online image editing application.

Picnik - Photo edit

Picnik is photo editing awesomeness! For basic fixes, collages and amazing photo effects, it's got touch up tools, tons of fonts, awesome shapes and stickers, and connects right to Facebook and all your other favorite photo sharing sites!

 Website: Picnik - Online image editing application

FotoFlexer - Image editor

FotoFlexer is one of the most advanced online digital photo editor. It performs advanced effects previously only available to professionals using expensive software. FotoFlexer integrates with leading photo sites and social networks. Import and export photos with ease.

 Website: FotoFlexer - Online advanced image editor application