Open source search engines

List of Open source search engines:

* DataparkSearch
* Egothor
* Grub
* Ht://dig
* Isearch
* Lucene
* Lemur Toolkit & Indri Search Engine
* mnoGoSearch
* Namazu
* Nutch
* OpenFTS
* Sciencenet (for scientific knowledge, based on YaCy technology)
* Sphinx
* SWISH-E
* Terrier Search Engine
* Wikia Search
* Xapian
* YaCy
* Zettair