OpenXPKI - OpenXPKI is a software stack that provides all necessary components to manage keys and certificates...
Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.
Dogtag PKI - The Dogtag Certificate System is an enterprise-class open source Certificate Authority (CA).
SQLite - SQLite Home Page
Vault by HashiCorp - Tool for managing secrets
PouchDB - Open-source JavaScript database inspired by Apache CouchDB that's designed to run well within the browser