Useful external packages / resources for Mathematica
In the spirit of [this][1] question about good Mathematica reading material, I want to ask you about what external packages / tools / resources you possibly use with Mathematica. I want to focus on general applicability in scientific research which as many people as possible will find useful.

 1. [LevelScheme][2] is a package that greatly expands Mathematica's capability to produce good looking plots. I use it if not for anything else then for the much, much improved control over frame/axes ticks.
 2. [MASH][3] is Daniel Reeves' excellent perl script essentially providing scripting support for Mathematica.

Not a single tool in itself, but there is a large repository of useful but usually very narrow packages on Wolfram's own site: [MathSource][4].


  [1]: http://programmers.stackexchange.com/q/19146/7801
  [2]: http://wnsl.physics.yale.edu/levelscheme/
  [3]: http://ai.eecs.umich.edu/people/dreeves/mash/
  [4]: http://library.wolfram.com/infocenter/MathSource/
Useful external packages / resources for Mathematica
===

In the spirit of [this][1] question about good Mathematica reading material, I want to ask you about what external packages / tools / resources you possibly use with Mathematica. I want to focus on general applicability in scientific research which as many people as possible will find useful.

 1. [LevelScheme][2] is a package that greatly expands Mathematica's capability to produce good looking plots. I use it if not for anything else then for the much, much improved control over frame/axes ticks.
 2. [MASH][3] is Daniel Reeves' excellent perl script essentially providing scripting support for Mathematica.

Not a single tool in itself, but there is a large repository of useful but usually very narrow packages on Wolfram's own site: [MathSource][4].


  [1]: http://programmers.stackexchange.com/q/19146/7801
  [2]: http://wnsl.physics.yale.edu/levelscheme/
  [3]: http://ai.eecs.umich.edu/people/dreeves/mash/
  [4]: http://library.wolfram.com/infocenter/MathSource/