withmarbleapp / os-taxonomy

An open, structured graph of 1,616 primary-school micro-topics with prerequisite dependencies and curriculum standards alignment.

amzxyz / rime-wanxiang

A Rime input scheme for Chinese pinyin built on a tone-annotated, frequency-tuned dictionary and grammar model, with Base, Pro, Lite and Pure editions.

ossu / computer-science

A free, self-paced computer science curriculum assembled from online courses and books, modeled on undergraduate CS degree requirements.