Matt is a huge proponent of WordPress and regularly contributes to the WordPress community. He is the author of several popular themes and plugins, and has made substantial contributions to the official WordPress Codex.
Q&A for WordPress developers and administrators
Q&A for professional and enthusiast programmers
Q&A for power users of Apple hardware and software
Q&A for Graphic Design professionals, students, and enthusiasts
Q&A for system and network administrators
Q&A for Ubuntu users and developers
Q&A for computer enthusiasts and power users
Q&A for linguists, etymologists, and serious English language enthusiasts
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Q&A for power users of web applications
Q&A for peer programmer code reviews
Q&A for engineers, producers, editors, and enthusiasts spanning the fields of video, and media creation