Overleaf is a collaborative writing and publishing system that makes the whole process of producing academic papers much quicker for both authors and publishers.
Overleaf is a free service that lets you create, edit and share your scientific ideas easily online using LaTeX, a comprehensive and powerful tool for scientific writing.
On-line tool to learn about cryptography. Supports a number of encryption methods (including Enigma).
An off-line version can be found on http://www.cryptool.org/
The Feynman Lectures Website and Caltech are pleased to present this online edition of The Feynman Lectures on Physics. Now, anyone with internet access and a web browser can enjoy reading a high-quality up-to-date copy of Feynman's legendary lectures. This edition has been designed for ease of reading on devices of any size or shape; text, figures and equations can all be zoomed without degradation.
It translates a subset of Common Lisp to Javascript
+ bignum arithmetic
- no SQRT, SIN, ATAN, FORMAT, APROPOS
- #x and #.r upset the reader
See also the author's blog http://davazp.net/2013/01/04/lisp-to-javascript.html
Web-based simulator of the hp15c calculator. Enhanced version with stack display. Note that contrary to emulators such as nonpareil, this simulator does not produce the same results as the real hp15c.