If you are looking for search engine software then try Yioop!
It is PHP based and Open Source so it is very easy to deploy it on Intranet or remote dedicated server. You can try it directly at yioop.com
About Milosz Galazka
Milosz is a Linux Foundation Certified Engineer working for a successful Polish company as a system administrator and a long time supporter of Free Software Foundation and Debian operating system. He is also open for new opportunities and challenges.