Here you may find all exercises with R from :
- Udacity - Statistics @ Sebastian Thrun
- Coursera's Statistics One
- Data Analysis and Statistical Inference class
- R Programming - Roger Peng et al. @ JHU
- Exploratory Data Analysis - Roger Peng et al. @ JHU
- Practical Machine Learning - Jeff Leek et al. @ JHU
- Programming for Everybody (Getting Started with Python)
My IDE of choice is the best RStudio. Just try it and follow its development here