TOOD

Master programming by recreating your favorite technologies from scratch.

A list of Free Software network services and web applications which can be hosted on your own servers

? Path to a free self-taught education in Computer Science!

A list of SaaS, PaaS and IaaS offerings that have free tiers of interest to devops and infradev

Open Source Computer Vision Library

《动手学深度学习》：面向中文读者、能运行、可讨论。中英文版被70多个国家的500多所大学用于教学。

List of Computer Science courses with video lectures.

The Patterns of Scalable, Reliable, and Performant Large-Scale Systems

:books: List of awesome university courses for learning Computer Science!

The communications platform that puts data protection first.