Here are some resources you might find helpful:

R

• The R Project
• Quick R
• The R Inferno
• R Tips
• Stats With R
• Applications of R
• Companies Using R

Python

• Python
• Learn Python in X Minutes
• Learn Python the Hard Way
• Learn Python (interactive)
• The Python Tutorial
• IPython
• The Python Package Index
• SciPy
• NumPy
• Matplotlib
• pyvideo.org

Web Sites & Blogs