Beautiful and accessible math in all browsers. MathJax is an open-source JavaScript display engine for LaTeX, MathML, and AsciiMath notation that works in all browsers. This package includes the packaged components (install mathjax-full to get the source code).
The Hunspell binding for nodejs that exposes as much of hunspell as possible and also adds new features. Hunspell is a first class spellcheck library used by Google, Apple, and Mozilla.