Here are a list of list of links and resources:
The Comprehensive R Archive Network
CRAN is a network of ftp and web servers around the world that store identical, up-to-date, versions of code and documentation for R.
Stack Overflow
Stack Overflow is a great resource where programmers share code for many different languages.
Data Camp
Data Camp give great online tutorials on various languages and aspects of Data Science. There is a fee, but some classes are free.
CodeCademy
Similar to Data Camp, CodeCademy has free and paid-for classes. Very long list of Data Science classes available.