YouSeer is an open source search engine framework, which was built on top of other open source components. It’s part of the general SeerSuite framework.  YouSeer utilizes Heritrix as a crawler and Solr as an indexing system. The framework provides software to ingest the documents harvested by Heritrix into Solr. The ingesting software is very flexible and allows for user-specific data extraction implementations.  Further, YouSeer provides a simple interface to query the index and another interface to retrieve cached versions of the documents.