DanGrayson's Stars
coq/coq
Coq is a formal proof management system. It provides a formal language to write mathematical definitions, executable algorithms and theorems together with an environment for semi-interactive development of machine-checked proofs.
UniMath/Foundations
Voevodsky's original development of the univalent foundations of mathematics in Coq
herbelin/coq-hh
Hugo Herbelin's public Coq branches