There is Manticore Search (https://github.com/manticoresoftware/manticoresearch https://github.com/manticoresoftware/manticoresearch) - it's a fork of Sphinx -

There is Manticore Search (https://github.com/manticoresoftware/manticoresearch https://github.com/manticoresoftware/manticoresearch) - it's a fork of Sphinx - written in C++, not based on Lucene library. (disclaimer: I was/am involved in both projects)