Formal proof of the Four Color Theorem [maintainer=@ybertot]

A library of abstract interfaces for mathematical structures in Coq [maintainer=@spitters,@Lysxia]

A library of Coq definitions, theorems, and tactics. [maintainers=@gmalecha,@liyishuai]

Coq Repository at Nijmegen [maintainers=@spitters,@VincentSe,@Lysxia]

Build dependency graphs between Coq objects [maintainers=@Karmaki,@ybertot]

The Coq Effective Algebra Library [maintainers=@CohenCyril,@proux01]

Automation for de Bruijn syntax and substitution in Coq [maintainers=@RalfJung,@co-dan]

Old Coq plugin for parametricity [maintainer=@ppedrot]

Coq plugin providing tactics for rewriting universally quantified equations, modulo associative (and possibly commutative) operators [maintainer=@palmskog]

Coq library and tactic for deciding Kleene algebras [maintainer=@tchajed]

Coq library of arbitrarily large numbers, providing BigN, BigZ, BigQ that used to be part of the standard library [maintainers=@proux01,@erikmd]

A Coq plugin to add reduction side effects to some Coq reduction strategies [maintainers=@liyishuai,@JasonGross]

Certified implementation in Coq of Stålmarck's algorithm for proving tautologies [maintainer=@palmskog]