From Open Search Server:
Open Search Server (OSS) is a search engine software developed under the GPL v3 open source licence.
Built using the best open source technologies available, Open Search Server is a stable, high-performance piece of software. It is both a modern search engine and a suite of high-powered full text search algorithms. Features : Multi-languages indexing. Documents can be indexed in sixteen languages - Chinese, Danish, Dutch, English, Finnish, French, German, Hungarian, Italian, Norwegian, Portuguese, Romanian, Russian, Spanish, Swedish, Turkish. Multi-lingual analysers slice sentences into words, then run lemmatisation algorithms on words based on the document's language (singular/plural, gender, conjugated verbs, etc.). The crawlers go through web sites and file systems to rapidly and easily build your index. Numerous document formats are supported, such as XML, HTML/XHTML, AdobeÃ????? PDF, MicrosoftÃ????? WordÃ?????, PowerPointÃ?????, OpenOfficeÃ?????, etc. The web interface is built around the power offered by the Zkoss framework. It runs with the main Ajax browsers. This RIA-type interface is as comfortable to use as that of a heavy client. Easy configuration through a single XML file, which includes fields definition and the indexation options. Quick integration thanks to an XML interface via HTTP queries (XML over HTTP). Open Search Server runs on Windows 20xx/XP/Vista, MacOS X, Solaris and Linux + Java Virtual Machine.