How to: Database Drivers
* [Cassandra Driver](https://github.com/datastax/ruby-driver) - A pure ruby driver for Apache Cassandra with asynchronous io and configurable load balancing, reconnection and retry policies.
* [mongo-ruby-driver](https://github.com/mongodb/mongo-ruby-driver) - MongoDB Ruby driver.
* [mysql2](https://github.com/brianmario/mysql2) - A modern, simple and very fast Mysql library for Ruby (binding to libmysql).
* [Neography](https://github.com/maxdemarzi/neography) - A thin Ruby wrapper to the Neo4j Rest API.
* [Redic](https://github.com/amakawa/redic) - Lightweight Redis Client.
* [redis-rb](https://github.com/redis/redis-rb) - A Ruby client that tries to match Redis' API one-to-one, while still providing an idiomatic interface.
* [ruby-pg](https://github.com/ged/ruby-pg) - Ruby interface to PostgreSQL 8.3 and later.
* [SQLite3](https://github.com/sparklemotion/sqlite3-ruby) - Ruby bindings for the SQLite3 embedded database.
* [SQL Server](https://github.com/rails-sqlserver/activerecord-sqlserver-adapter) - The SQL Server adapter for ActiveRecord.
* [TinyTDS](https://github.com/rails-sqlserver/tiny_tds) - FreeTDS bindings for Ruby using DB-Library.
* [Trilogy](https://github.com/trilogy-libraries/trilogy) - A performance-oriented C library for MySQL-compatible databases.