- karmi/retire 1,899 A rich Ruby API and DSL for the Elasticsearch search engine
- mythz/jquip 1,434 jQuery in Parts
- addthis/stream-lib 1,415 Stream summarizer and cardinality estimator.
- postmodern/spidr 407 A versatile Ruby web spidering library that can spider a site, multiple domains, certain links or infinitely. Spidr is designed to be fast and easy to use.
- fizx/robots 39 robots.txt parser