What are some alternatives?
When comparing Dark Room and Pixlr, you can also consider the following products
Priime - Edit photos with the styles of the world's top photographers. Smart suggestions, fast editing, and inspiring collections.
GIMP - GIMP is a multiplatform photo manipulation tool.
Snapseed - Snapseed is a photo enhancement and sharing app with a powerful suite of imaging filters and tools...
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
Manual Camera for iPhone - Custom exposure for your iPhone camera
Pixelmator - Pixelmator is an image-editing application for Mac and iPad.