[hsitz]

One of the many features of Org-mode in Emacs is that it functions in a similar-style to IPython's notebook for over twenty different languages, Octave, R, Ruby, Python, C, C++ and others: http://orgmode.org/worg/org-contrib/babel/languages.html

The related features in Org-mode are known as Org-babel, uniting disparate languages under the single umbrella of Org-mode. The support for language evaluation in Org-mode is slightly more cumbersome than that offered in IPython, but also arguably more flexible and powerful. Plus you get to edit your notebook in a powerful editor with best outliner ever, plus all of Org-mode's many other features (I'm a Vim person but I give credit where credit is due).

Org-babel is a rich and deep niche of Org-mode, and one of the areas under the most constant development. You can read some docs on it here, but it can be hard to wrap your head around all of it until you actually use it:

http://orgmode.org/manual/Working-With-Source-Code.html#Work...