Did you like Statistics - Wikipedia in school/university? Some people (like me) did, some not. However, if you work with IT, sooner or later you need it. Why not having another look on stats?

The University of California, Berkeley published their course materials for “Introduction to Data Science” on Internet. Nice material, not difficult and well known languages and tools are covered - and it goes without saying you will only use open source stuff…

Phython, R and databases are used when you subdue big data. HTML, CSS and JavaScript for web programming.

On Mac OS X, BSD and Linux you can install Python and R with favourite package manager. If you prefer GUI here is one for R: RStudio.

Have fun with statistics (again)!