There are 1 repository under metamath topic.
Metamath-lamp (Lite Assistant for Metamath Proofs) is a GUI-based proof assistant for creating formal mathematical proofs in Metamath that does not require installation (just run it directly using your web browser).
An exhaustive condensed detachment formal proof generator for Hilbert systems in proof theory.
Guide on how to use the metamath-lamp proof assistant
Nonlinear Mathematics Example
Principia: Metamath-like Logician Language