Just found this tool,pretty new.I've tried it about 1 hours,Some how it helps,helps me to calm down to have a good mood to think. I have to say this is sweet cool.
Just like it says:Search over projects from Github, Bitbucket, Google Code, Codeplex, Sourceforge, Fedora Project to find real-world usage variable names — http://unbug.github.io/codelf/
This is a great app,some time I really want to quite my job and do my own project like him,but I don't really know what is stoping me to do it,maybe I just don't have the courage.