Moneta is a Ruby library to interface with a variety of key/value stores. A short overview of its features: - support a lot of backends with consistent behaviour, - allows a full configuration of the serialization -> compression -> adapter stack using proxies (similar to Rack middlewares), - expiration for all stores, - atomic operations, - includes a simple pure-ruby key/value server and client, - integration with Rails, Rack/Rack-Cache, Sinatra and Ramaze.