I spent most of my time working with Java and PHP. I work in an open-source consultancy. Work environment is so nice that I don't even feel like working.
Recently I got an interest in Hadoop and big data stuff.
Q&A for professional and enthusiast programmers
Q&A for professional and independent game developers
Q&A for user experience researchers and experts
Q&A for professional system and network administrators
Q&A for computer enthusiasts and power users
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Q&A for professional graphic designers and non-designers trying to do their own graphic design