Mathematics
- arXiv - Open access papers [link]
- Combinatorics and more - Gil Kalai's blog [link]
- What's new - Terence Tao's blog [link]
- Wolfram Alpha - Online version of Mathematica [link]
- Online Math courses at MIT [link]
- Wolfram MathWorld - Mathematics resource [link]
- Math StackExchange - Maths forum [link]
- MathOverflow - Maths forum [link]
LaTeX
Resources
- TeX stackexchange [link]
- Displaying a formula [link]