Isso – Ich schrei sonst – is a lightweight commenting server written in Python and JavaScript. It aims to be a drop-in replacement for Disqus.
Styletron is a universal CSS-in-JS engine built from the ground up for high-performance.
Shareable JavaScript Benchmarking
Prepack is a tool that optimizes JavaScript source code: Computations that can be done at compile-time instead of run-time get eliminated. Prepack replaces the global code of a JavaScript bundle with equivalent code that is a simple sequence of assignments. This gets rid of most intermediate computations and object allocations.
Cheatsheet list of techniques and patterns for maximizing software performance and scalability
A tool for developing responsive websites crazy-fast.
Open sourced : https://github.com/kitze/sizzy
Machine Learning in Python
Simple and efficient tools for data mining and data analysis
Accessible to everybody, and reusable in various contexts
Built on NumPy, SciPy, and matplotlib
Open source, commercially usable - BSD license
Speech and natural language tools