propublica/daybreak

               ^^            |
    daybreak     ^^        \ _ /
                        -= /   \ =-
  ~^~ ^ ^~^~ ~^~ ~ ~^~~^~^-=~=~=-~^~^~^~

Daybreak is a simple key value store for ruby. It has user defined persistence,
and all data is stored in a table in memory so ruby niceties are available.
Daybreak is faster than other ruby options like pstore or dbm.

$ gem install daybreak

You can find detailed documentation at http://propublica.github.com/daybreak.