minica is a small, simple CA intended for use in situations where the CA operator also operates each host where a certificate will be used. It automatically generates both a key and a certificate when asked to produce a certificate. It does not offer OCSP or CRL services. Minica is appropriate, for instance, for generating certificates for RPC systems or microservices.
Hitch is a libev-based high performance SSL/TLS proxy by Varnish Software.
sslh accepts connections on specified ports, and forwards them further based on tests performed on the first data packet sent by the remote client.