"Julia is a high-level, high-performance dynamic programming language for technical computing." The language is elegant (homoiconic, multiple-dispatch, consistent and extensible type system), but with easy-to-learn syntax. The standard library includes a wide array of fast and useful functions, and the number of useful packages is growing. [more inside]
Interactive map of pronunciation and use of various words and phrases differs by region in the US. Based on Bert Vaux's online survey of English dialects, the program allows you to see results for individual cities, as well as nationwide (though inexplicably it does not include Alaska or Hawaii).
OpenCPU provides a RESTful interface to the popular open-source statistical package R, enabling the user to perform calculations and create publication-quality or web-embeddable visualizations via standard web requests.
Dataists give their hopes and dreams for data, data tools and data science in 2011. Already, Google has provided Google Refine (previously) to help clean your datasets. While great visualizations can be created with online tools or by combining R (great posts previously), with ggplot2, GGobi, and even Google Motion Charts With R (already built into Google Spreadsheets). Need data? Needlebase, helps non-programmers scrape, harvest, merge, and data from the web. Or if you’re introspective, Your Flowing Data and Daytum provide tools to measure and chart details of your own life.
R is powerful, but tricky. RKWard is an UI that make R user friendly or, at least, make it more similar to SPSS or Stata. Screenshots!
R is quickly becoming the programming language for data analysis and statistics. R (an implementation of S) is free, open-source, and has hundreds of packages available. You can use it on the command-line, through a GUI, or in your favorite text editor. Use it with Python, Perl, or Java. Sweave R code into LaTeX documents for reproducible research. [more inside]