I've seen a ton of data science courses that keep coming up on the internet. Here is a post to refer to when I decide to spend some time to learn something new
- prakhar1989/awesome-courses: List of awesome university courses for learning Computer Science!
- fffaraz/MOOC: List of free online programming/CS courses
- Here's a list of 120 free online programming/CS courses (MOOCs) with feedback(i.e. exams/homeworks/assignments) that you can start this month (Jan 2015) : learnprogramming
- Class Central • Discover Free Online Courses • MOOC Aggregator and Reviews