For students:
Other useful tools
- EqWorld – The World of Mathematical Equations
- Detexify, for latex users, this website will help you to save a lot of time!
- Mendeley, according to me, one of the best free reference manager: references and pdf are on your computer and online, a save button in the bookmarks toolbar, classify in folders or with tags, possibility to annotate your pdf, generate bibtex with clic!, …