A list of known OCSP hosts as observed by https://crt.sh/ocsp-responders

OCSP Server for Google Cloud Certificate Service

A nestjs / nodejs and openssl based pki. Including an ocsp-responder, distrubution-server for CRLs and CRTs and some little extra gimmicks

Automatic, fast and reliable OCSP. Listen to requests, send responses, cache implemented. Must be linked to a certificate database.

Automatic OCSP, can cache responses and retrieve them. Must be linked to a certificate database.

DyOCSP - Flexible DB OCSP Responder

A simple CA server to create multiple intermediate CAs and generate certs, keystore, truststore with simple API

An example of public key infrastructure with an offline root certificate authority on linux

Custom PKI generator (Based on OpenSSL) including Root-CA, Intermediate-CA, OCSP-Respnder and management of server/client certificates

A simple OCSP responder built with ASP.NET Core.

a caching ocsp proxy. It accepts ocsp requests from any client, e.g. an ssl-webserver, and forwards the request to the corresponding ocsp responders or returns the ocsp response from cache. Can be used to mitigate unreliable ocsp responders that are, as required by murphy's law, always down when needed.

A .NET facility to create an OCSP Responder. Written in C# under netstandard it has support for .NET Full and .NET Core

Django app providing a Certificate Authority

XiPKI: Compact open source PKI (CA, OCSP responder, certificate protocols ACME, CMP, EST).