The author has been using Rails since 2005 but has recently found it feels like a Java framework and is sluggish with a large memory footprint. They have been learning Monk and Ohm, which are modular Ruby frameworks that rely on tools like Rack, Sinatra, and Redis for speed. Monk is a glue framework for web development and Ohm stores objects in Redis. The author compares Rails components to equivalent Monk/Ohm libraries and suggests Monk as an alternative to Rails for new projects.