Beaker
The Beaker Notebook is a new open source tool for research and data science. It's advanced UI allows you to focus on your data and your science, instead of getting frustrated by your tool. We designed it to be polyglot from the ground up. That is, a single notebook may contain code from multiple different languages that communicate with one another through a unique feature called autotranslation. You can set a variable in a Python cell and then read that variable in a subsequent R cell, and everything just works, magically. Beaker comes with built-in support for Python, R, Javascript, Scala, Groovy, Julia, Clojure, and K.
