I'm working with several Open Source projects, hosted on Github and Launchpad. Mostly I prefer C and C++, and for web-applications PHP. Recently I've started working on Android development.
Also helping in the development of the Bitcoin infrastructure; specifically for using bitcoin in stores.
Q&A for professional and enthusiast programmers
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems
Q&A for Ubuntu users and developers
Q&A for professional and independent game developers
Q&A for system and network administrators
Q&A for computer enthusiasts and power users
Q&A for enthusiasts and power users of the Android operating system
Q&A for information security professionals
Q&A for linguists, etymologists, and serious English language enthusiasts
Q&A for Bitcoin crypto-currency enthusiasts