Data Analysis for Life Sciences : https://www.edx.org/xseries/data-analysis-life-sciences
Podcast by Data Scientist : https://soundcloud.com/nssd-podcast
Data Visualization : http://socviz.co/
R CookBook : http://www.cookbook-r.com/
GGPLOT2 Mastery : https://github.com/hadley/ggplot2-book
R packages : http://r-pkgs.had.co.nz/
Advanced R : http://adv-r.had.co.nz/
R for Data Sciences : https://r4ds.had.co.nz/
Text Mining : https://www.tidytextmining.com/
Fundamentals of Data Visualization : https://serialmentor.com/dataviz/
STAT 545 Notes University of British Colombia : https://github.com/STAT545-UBC
The Caret Package : http://topepo.github.io/caret/