Here you can find some useful web sites, programs and macros for R and SAS.
R wiki and its R tips
R cookbook: another R wiki
R tips: random help
Quick-R for example the Graphical parameters page
R graph gallery: collection of plots to enhance your data visualization with R
R style guide
Tricks for memory management on Stackoverflow (and here in French)
Aide mémoire R: le langage, les stats, les graphes.
WinBUGS Examples: Volume 1, Volume 2, Volume 3. JAGS examples.
Working with big data.
HTML5 slides with RStudio and knitr.