Here I list links to scientific tools useful in computational science as well as some interesting popular science related links.

Tools for Computational Science

Departments/Originizations

CSRC: Computational Science Research Center at SDSU



Computational Software Tools

MATLAB - An extremely useful computational software.
Dfield and Pplane - Very useful free java applet/MATLAB code to study ODE dynamics.
CUDA - NVIDIA's GPU API - great way to speed up code cheaply using graphics cards.
CUDA-Z - Freeware pgram that gives detailed real-time info on and Nvidia GPU cards installed.
Speccy - Freeware program for windows which gives extreamly detailed system information.
MAPLE - Symbolic and numerical math software.
Mathimatica- Symbolic and numerical math software.
WolframAlpha - Free online search that computes math with Mathimatica.
IDL - MATLAB style software with good visuals.
Scientific Workplace - LATEX WYSIWYG with symbolic math using MuPad attached.

Programming Language and Editing Tools

Visual Studio Express - Free version of Microsoft C++ etc. compilers.
Cygwin - A Linux-like environment for Windows, includes free X-windows and code compilers.  
G95 - Free Windows FORTRAN 95 compiler for use with Cygwin.
MPICH2 - Free Windows MPI C/FORTRAN compiler that works with Cygwin.
Crimson Editor - Free source code  text editor for Windows.  Has FTP capability.
Jedit - Free text editor specifically designed for writing code.  Can install free add-ons like sftp integration etc.
JGRASP - Free JAVA development platform.

Communication and File/Imaging Tools

SSH Secure Shell - Freeware SSH and SFTP client.  Since it is hard to find at the official site, the link goes to my install file.
Core FTP LE - A very nice free FTP tool for Windows that supports SFTP.
Dropbox - An extreamly useful free tool that allows one to synch files simply and easily over the web.  Has too many good features to list here.
GoToMyPC - An extreamly useful tool which allows one to access and control a PC remotly form teh web.
Kompozer - A freeware website WYSIWYG HTML editor which produces very clean code.
GIMP - Free image editor, OK alternative to photoshop/psp.
OpenDX - Free high-quality data visualization software.
Oxelon Audio and Video Converter - The BEST freeware video/audio converter I have found.
7-Zip - Free unzipping tool for Windows which can handle gz and tar files.

Manuscript/Presentation Tools

MIKTEX/LATEX - THE standard scripting language for scientific publications.  Miktex is for Windows, Latex for Linux.
Winshell - Free tool to develop Latex documents on Windows
Aurora - $35 Latex add-on for MS Word and Powerpoint.  VERY useful for presentations.
eps2pdf - Free tool that is in windows (included in ghost script?) to convert a eps or ps image to a pdf. (Run in command prompt)
PDFSam - Free tool to split and merge pdfs (very useful for signature pages)
ConvertMyPDF - Free tool to convert a pdf into txt, doc, jpg, or html
Ghostscript/GSview - Free pdf/eps viewer and converter.

Other Computer Tools

CCleaner - Freeware program that cleans up windows machines and fixes registry errors.
Defragger - Freeware defragger tool which works better and faster than the windows one.
Recuva - Freeware program to recover lost files on a hard drive.  Really good for after a hard drive crash.

Computer Games (everyone needs a break now and then...)

Kyodai Mahjongg - Really relaxing and almost freeware mahjongg (and other) games with 3D graphics.
Good Old Games - Nice site which takes old PC games and tweaks them to work on new OS/machines and sells them cheap.

Popular Science

The Mechanical Universe and Beyond
This is a very good series on physics that I first saw in my high school physics class. It explains things very nicely with some history added in to keep it interesting. The episodes on relativity and quantum mechanics are extremely good at explaining these topics using animations. A must watch! The episodes are FREE to stream online in you register at the site for free.


Astronomy Picture of the Day
This site displays a new Astronomy picture every day with an explanation of whats in the picture, including external links to learn more.
It is a very handy site if you want to change the wallpaper of your computer with something new and nice looking every day!


BrainPop
This site is a great site to teach kids (and adults) all about basic Science, Math, as well as other topics.
Although to view all the lessons, you have to pay, there are more than a few for free!