Memcached
Memcached is a high-performance, distributed memory object caching system, generic in nature, but intended for use in speeding up dynamic web applications by alleviating database load.
Links:
Memcached homepage
Distributed Caching with Memcached
Memcached Basics for Rails
memcached Basics for Rails: Part II
Using memcached for Ruby on Rails session storage
Comparing Memcached and Ehcache Performance
Fastest languages for memcached
How Digg.com uses the [...]
