Redis

Redis (REmote DIctionary Server) is an open-source, networked, in-memory, key-value data store with optional durability. It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets and sorted sets.

Free Open Source Mac OS X Windows Linux BSD Self-Hosted

memcached

Free & open source, high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by...

Free Open Source Mac OS X Linux

HyperDex

HyperDex is the next generation key-value store. It provides a rich API, strong consistency, fault-tolerance, and transactions.

Free Open Source Linux

XCache

XCache is a fast, stable PHP opcode cacher that has been tested and is now running on production servers under high load. It is tested on Linux and FreeBSD and supported...

Free Open Source Mac OS X Windows Linux

Apache Ignite

high-performance, integrated and distributed in-memory platform for computing and transacting on large-scale data sets in real-time.

Free Mac OS X Windows Linux Web

eAccelerator

eAccelerator is a free open-source PHP accelerator & optimizer. It increases the performance of PHP scripts by caching them in their compiled state, so that the...

Free Open Source Linux Web