Artica Proxy - Artica Proxy is an appliance that claim to manage Squid-cache proxy with all features that Squid...
Skytable - Skytable is a free and open-source realtime NoSQL database that aims to provide flexible data modelling at scale.
Polipo - A small and fast caching web proxy (a web cache, an HTTP proxy, a proxy server).
Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.
Privoxy - Privoxy helps users to protect their privacy.
KeyDB - KeyDB is fast NoSQL database with full compatibility for Redis APIs, clients, and modules.