Brent Sordyl's blog

Ruby Sequel – The Database Toolkit for Ruby
# Sequel provides thread safety, connection pooling and a concise DSL for constructing database queries and table schemas.
# Sequel also includes a lightweight but comprehensive ORM layer for mapping records to Ruby objects and handling associated records.
# Sequel makes it easy to deal with multiple records without having to break your teeth on SQL.
# Sequel currently has adapters for ADO, DB2, DBI, Informix, JDBC, MySQL, ODBC, OpenBase, Oracle, PostgreSQL and SQLite3.