ONull

“ONull is an image based Vector Generator for Mac OSX. It allows the user to convert images into rasterized vector graphics. This tool was developed to give graphic designers the ability to transform small images from the Internet into printable and editable graphics.”

Showcase here.

Livebrush

“Livebrush is a drawing application. It employs an easy-to-use brush tool that reacts to your gesture. By combining simple motion controls with brush styles, Livebrush offers a fun and unique way to create graphics.”

iProcessing

iProcessing is an open programming framework to help people develop native iPhone applications using the Processing language. It is an integration of the Processing.js library and a Javascript application framework for iPhone.

Axiis

“Axiis is an open source data visualization framework designed for beginner and expert developers alike. Axiis is built upon the Degrafa graphics framework and Adobe Flex 3.”