Git Source Code Mirror - This is a publish-only repository but pull requests can be turned into patches to the mailing list via GitGitGadget (https://gitgitgadget.github.io/). Please follow Documentation/SubmittingPatches procedure for any of your improvements.
tmux source code
HashCheck Shell Extension for Windows with added SHA2, SHA3, and multithreading; originally from code.kliu.org
MirBSD Korn Shell Source Code Mirror – This is a publish-only repository and all pull requests are ignored. This repository is a mirror and may receive forced (non-fast-forward) updates. Please contribute to the CVS repository of The MirOS Project instead.