ssloy/tinyraytracer

CS-Notes is a GitHub repository maintained by CyC2018 that collects Chinese-language study notes across ten topic areas: algorithms, operating systems, networking, object-oriented design, databases, Java, system design, tools, coding practice, and an afterword. It links each topic to standalone markdown files instead of writing everything inline, and the README says most of the content is original work rather than material copied from elsewhere.

Bitcoin Core is the reference implementation of the Bitcoin protocol, hosted at bitcoin/bitcoin on GitHub. Per its README, it joins the Bitcoin peer-to-peer network to independently validate blocks and transactions, ships an optional wallet and GUI, and is written in C++ under the MIT license.

OBS Studio (obsproject/obs-studio) is a free video capture and streaming tool released under GPL-2.0. Its topics list points to game capture, screen capture, DirectShow device input, and streaming built around Twitch, YouTube Live, and Facebook Live, and the project funds itself through Patreon, OpenCollective, and PayPal.

Hello-Agents is a free, Datawhale-run curriculum at datawhalechina/hello-agents, carrying 72,797 GitHub stars, that teaches AI agent development from core theory through a working multi-agent build. The README frames it as training AI-native agents driven by the model's own reasoning, distinct from flow-based low-code builders like Dify or Coze, across 16 complete chapters organized into five parts, with an optional PDF and a companion code framework called HelloAgents.