Duotone - Convert any photo to a duotone in seconds
Codenail - Create art with your code and logo and order a poster of it
Dreamscope - Make and share 'deep dream' images using dozens of supplied styles or your own.
EditedImages - The web's best photoshopped images
Photo + Music = Video - Photo + Music = Video (also known as Video Slideshow Editor) developed by Manas Hive.
Commits.io - Create a poster for your office using your code