http://aprendreios.wordpress.com (in Catalan)
Q&A for professional and enthusiast programmers
Q&A for professional and independent game developers
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Q&A for users of Linux, FreeBSD and other Un*x-like operating systems.
Q&A for developers of open-source hardware and software that is compatible with Arduino
Stack Exchange Network staging zone, where users come together to build new Q&A sites