OpenSearchServer is a powerful, enterprise-class, search engine program. Using its Web user interface, crawlers (Web, file, database, etc.), and REST/RESTFul API, you can integrate advanced full-text search capabilities into your application.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
This release has new features and bugfixes. The Web crawler stores a date telling when a page has been updated. It also stores a unique key to identify when pages are identical. The robots.txt check can be disabled. The database crawler is able to crawl URLs returned by an SQL query. The pattern list and the exclusion list can be disabled. It is now possible to boost the score of terms at indexation time. Queries are able to identify similar documents. CJK languages are supported.
