Twinsta - Sharing tweets on Instagram has never been so easy!
Fenetre App - Picture in picture for your mac.
Typorama - Typorama: Text on Photo Editor is a Typography Art and Poster Maker application created and published by Apperto Ltd.
Polarr Photo Editor 3 - The most powerful photo editor in the web.
TweetPik - Easily convert tweets to images SVG, PNG and JPG
Pixelmator - Pixelmator is an image-editing application for Mac and iPad.