Alternative PHP Cache
APCu - APC User Cache
APCu Backwards Compatibility Module
A fast database for constant data with memory sharing across processes
Constants for real
memcached extension, provides handy OO and procedural interfaces, can be used as session handler.
PHP extension for interfacing with memcached via libmemcached library
Transparently cache PHP functions
Varnish Cache bindings
Windows Cache Extension for PHP
lockless user data cache
The Zend OPcache provides faster PHP execution through opcode caching and optimization.