Nature
Science
Proceedings of the Royal Society A (Mathematical, Physical and Engineering Sciences)
Proceedings of the Royal Society B (Biological Sciences)
PNAS: Proceedings of the National Academy of Sciences
Journal of Theoretical Biology
arXiv.org: e-Print Archive
Powers of Ten
HyperPhysics: Physics Tutorials
Astronomy Picture of the Day
NASA - Solar Eclipse Page
William Lowell Putnam Mathematics Competition
Purdue University Problem of the Week
Project Euler: Challenging Mathematical/Computer Programming Problems
Clay Mathematics Institute
List of NP-Complete Problems
Biographies of Scientists and Mathematicians
Python Documentation
Epydoc: Automatic API Documentation Generation for Python
Sphinx: Python Documentation Generator
SciPy: Scientific Tools for Python
Sage: Open Source Mathematics Software
Matplotlib: Python 2D Plotting Library
NetworkX: High Productivity Software for Complex Networks
igraph: Library for Complex Network Research
PyCUDA
Processing: Visual Programming Language
NetLogo: A Multi-Agent Programmable Modeling Environment
JOde: A Java Applet for Studying Ordinary Differential Equations
MIT Mathlets: MIT Interactive Mathematics Site
Virtual Labs in Evolutionary Game Theory
JabRef: Reference Manager
JavaScript Tutorial
MathJax: Beautiful Math in all Browsers
Protovis: A Graphical Approach to Visualization
d3.js: Data-Driven Documents
Raphaƫl: JavaScript Library for Vector Graphics on the Web
JQuery: The Write Less, Do More JavaScript Library
Underscore.js: Utility-Belt Library for JavaScript
RequireJS: JavaScript File and Module Loader
Node.js: For Building Scalable Network Programs
JSON (JavaScript Object Notation): A Lightweight Data-Interchange Format
Tufte-LaTeX: A Tufte-Inspired LaTeX Class for Producing Handouts, Papers, and Books
TeXample.net: Ample Resources for TeX Users
LaTeX Wikibook
Comprehensive LaTeX Symbol List
FoilTeX
Asymptote: The Vector Graphics Language
Grace: A WYSIWYG 2D Plotting Tool
Gephi: Interactive Visualization and Exploration Platform
Cytoscape: An Open Source Platform for Complex-Network Analysis and Visualization
Social Network Image Animator
UCBLogo: Berkeley Logo
Eureqa: Detects Hidden Mathematical Relationships in Data
MongoDB: A Scalable, High-Performance, Open Source, Document-Oriented Database
NVIDIA Developer Zone
Network Datasets
xkcd: A Webcomic of Romance, Sarcasm, Math, and Language
PhD (Piled Higher and Deeper): A Grad Student Comic Strip
Journal of Universal Rejection
The Official Website of the Nobel Prize
Project Guttenberg
Free Software Foundation
Center for Complex Network Research at Northeastern University
Academic Earth: Online Courses from the World's Top Scholars
Khan Academy