The document discusses ProjectHub, a software that crawls, indexes, and allows searching of software project data using various tools like Droids, Tika, Solr, and Hadoop. It describes the architecture which gathers information from different sources like JIRA, mailing lists, code repositories, and indexes it using Solr for faceted search, spellchecking, autocomplete and other features. It also discusses performance monitoring, analytics and future plans.