Namazu

Namazu is a full-text search engine intended for easy use. Not only does it work as a small or medium scale Web search engine, but also as a personal search system for email or other files. Namazu broadly consists of three components, mknmz that creates index before searching (written in perl), namazu which searches documents based on the created index - command line script (written in C), and namazu.cgi, a CGI scrip for searching documents based on the created index (written in C).