Ask HN: Cool projects to work on?

Hi,

due to unexpected vacations (thanks German bureaucracy), I will be free from tomorrow until the 22nd.

I would like to use this time to hack on a cool project. Maybe something that could go on my github page.

I ask here because I would like to "work" for someone that is in business. So that I can get some feedback and mentorship. I don't have the chance to talk to programmers and people in start ups in my daily life. I thought this might be a chance.

I am an amateur programmer. I work in Finance. I know python, a bit of clojure, and I find C quite cool. I am looking to gain experience in data analysis/visualization, financial/business applications. I hope to live finance one day, you know...