Ruby interface to multiple key/value stores

 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.