Closure Tree — Easily and efficiently make your ActiveRecord models support hierarchies using a Closure Table. Hanami — It aims to bring back Object Oriented Programming to web development, leveraging on a stable API, a minimal DSL, and plain objects. TraceView — Full-stack application tracing and brilliant data visualization to build faster, more reliable web apps. DataMapper — ORM which works well with legacy databases. Ruby Rogues — Weekly panel discussion about programming, primarily in Ruby.