FreshBSD
BSD Commit Log Search
A search engine/viewer for source code commits, focused on projects of interest to the BSD community.
Currently into its fourth rewrite, backed by Elasticsearch, PostgreSQL and Redis, with the site itself running on JRuby and Roda, making use of concurrent-ruby to parallelise data retrieval and inserts.
Previous versions have used Rails, Sinatra, Padrino, Solr, MySQL, and memcached.