Cuba - Cuba is a Ruby microframework for web development.
Wedio - Your Local Camera Sharing Community
Ramaze - Ramaze is a very simple and straight-forward web-framework.
NYNY - A (ridiculously) small and powerful web framework.
Scorched - Scorched is a generic, unopinionated, DRY, light-weight web framework for Ruby.
Hanami - Hanami is a modern web framework for Ruby.