Get started on time series in R with this xts cheat sheet, with code examples.

Learn everything on the new DataCamp design, and navigate between 60 hours of interactive R tutorials to continue your data science career.

OpenIntro statistics covers a wide range of material on statistics such as videos, textbooks, and interactive R tutorials and courses.

Get notified when R packages documentation and manuals are updated via the free email service of Rdocumentation.

R-fiddle lets you run and write R in the cloud, all in the comfort of your own browser. Play around with R code in the your own browser.

Quandl lets you rapidly search 8 million ready-to-use data sets in numerical data. Learn how to use it in R with the free Quandl Tutorial.

DataCamp offers free online interactive R courses to on Data Analysis and Statistical Inference and Introduction to Computational Finance.

DataCamp is the fastest way to learn R and data science. Learn in the comfort of your own browser via R tutorials and challenges.

R -Fiddle is a free and powerful tool to write, run and share R-code inside your browser. Include packages to really run R in the cloud.

DataMind is the first free online Interactive Learning Platform for R. Through an in-browser coding environment you can learn R by doing.