Poet.so - Capture and share Twitter posts as beautiful images
Priime - Edit photos with the styles of the world's top photographers. Smart suggestions, fast editing, and inspiring collections.
Tweetlet - Tweetlet is a free tool that lets you create beautiful images from your tweets, text, and any other images in a snap.
Dark Room - A quick, powerful photo editor that gives you control
Pullquote - Tweet quotes and cropped images from the web easily
Nizo - A better iPhone camera for shooting film