NoSQL With MySQL in Ruby - Friendly

Store schema-less data in MySQL.
Evolve your data model without feeling the pain of migrations.
Build indexes offline
Building an index can take hours with a lot of data. Stay agile without taking your app offline.
Write-through and read-through caching baked right in.
Fast websites make more money. The 99.8% cache hit rate we see in production is a one-liner with Friendly.

Nice! I started a project to do this same thing, but whatever, this one’s already done :)