libclucene

CLucene is a high-performance, scalable, cross platform, full-featured, open-source indexing and searching API written in C++. CLucene is a port of the very popular Java Lucene text search engine API. Specifically, CLucene is the guts of a search engine, the hard stuff. CLucene aims to be a good alternative to Java Lucene when performance really matters or if you want to stick to good old C++.