localhost-cert
A secure and convenient solution for enabling HTTPS on localhost
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.
backloop.dev
Local HTTPS development with *.backloop.dev pointing to localhost and SSL certificates
hostlocal
Serve files from a directory over HTTP/1.1 and HTTP/2, with live reload notifications over a websocket. It will automatically create self-signed certificates.