Developer Java, J2Me, J2ee, php, a bit of android
learn Go or python as google is using them extensively and there are free servers hosted by them.
Useful search page http://sel2in.com/g.html
Help's with database questions and answers http://sqlfiddle.com/ (build sample data base and queries to illustrate)
http://krya.in organic dish washer
SIGAR Monitor https://support.hyperic.com/display/SIGAR/Home