CLucene

If you're after a search engine that delivers top-notch performance and is loaded with features, then give CLucene a try. This software is an adaptation of Lucene - an exceptional text search engine - but it's been rewritten in C++, which means that it delivers even better performance than its predecessor.

The best thing about CLucene is that it provides you with the critical guts of a search engine. You get to write your user interface and the process of sifting through your data files to pump them into your search engine yourself. This approach is brilliant since it puts you in full control of your search engine. You get to customize it to your needs and preferences so that it's tailored precisely to your unique requirements.

If you're looking for an excellent alternative to Java Lucene that delivers fantastic performance or you're a fan of the good old C++, then look no further than CLucene. This software is an outstanding choice for power users who want full control over their search engines and need nothing but top-quality performance.