WebKit is an open source web engine that powers Google Chrome,
Apple Safari, Palm webOS, and the mobile browsers of Symbian,
iOS, Android, and MeeGo. My contributions have mainly been
on the QtWebKit port, the coordinated graphics system,
and a few patches on the Mac port.

SpeedCrunch is a fast keyboard-oriented, high-precision
cross-platform scientific calculator. I'm its maintainer and core
developer. The source code with all my contributions is
available. It has been downloaded by ~1M+ people worldwide.

Co-wrote this tool that enables remote JavaScript code debugging
running on an Android device or emulator (source code).

Co-wrote this tool that allows one to record test cases for web
applications on Android devices, meaning that all user
interaction with a web page will be recorded (source code)

A live demo of yet another plasma effect.