Notable open-source contributions include matchbook, a platform-agnostic matchmaking service, API, and SDK for mobile applications (think multi-platform real-time gaming), a thread-safe wrapper for Apple's Core Data framework, and a screen-capture utility for iOS.
I've also self-published a book about self-publishing books, and a comic reader app for the iPhone. I maintain and occasionally update a blog about various topics that I happen to find interesting or noteworthy.
Q&A for professional and enthusiast programmers
Q&A for members of the workforce navigating the professional setting
Q&A for professional programmers interested in conceptual questions about software development
Q&A for peer programmer code reviews
Q&A for passionate videogamers on all platforms
Q&A for computer enthusiasts and power users
Q&A for science fiction and fantasy enthusiasts
Q&A for people who want to be financially literate
Q&A for people interested in statistics, machine learning, data analysis, data mining, and data visualization
Q&A for contractors and serious DIYers
Q&A for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles
Q&A for professional system and network administrators
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Q&A for engineers, producers, editors, and enthusiasts spanning the fields of video, and media creation
Q&A for power users of web applications
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Q&A for power users of Apple hardware and software
Q&A for scientific skepticism
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Q&A for musicians, students, and enthusiasts
Q&A for Bitcoin crypto-currency enthusiasts