R is an open source statistical software. Many package enable statistical data analysis.
In the press
"R first appeared in 1996, when the statistics professors Ross Ihaka and Robert Gentleman of the University of Auckland in New Zealand released the code as a free software package. [...] Some statisticians who took an early look at the software considered it rough around the edges. But despite its shortcomings, R immediately gained a following with people who saw the possibilities in customizing the free software. "Examples of R usage by David Smith:
- R is used frequently by The New York Times to produce consistently great infographics.
- Google uses R to calculate the ROI on advertising campaigns.