tls-keygen
Generate a self-signed TLS certificate and add it to the trusted certificate store.
@knapsack/https
Automatically provisions and installs locally-trusted TLS certificates for Node.js https servers (including Express.js, etc.) using mkcert.
mock-tls-server
Mock up a plain or TLS-encrypted TCP connection without using any actual network facilities or needing any permissions. This is useful for testing, particularly playing around with different TLS failure modes.