Recommend CISearch.NET 2.69

Browser based Microsoft Exchange and network file system search engine. Capable of content indexing millions of files and Emails. A complicated content based search on a million files can be performed in seconds. Centralised deployment on one server, browser based search forms, browser based admin interface, Inteliquery(tm) optimisations, friendly names for locations on your network and full respect for NTFS and Exchange permissions.

CISearch.Net harnesses the power of Microsoft's own Indexing Service, the same technology that drives solutions like Microsoft's own SharePoint product.

Written in ASP.Net CISearch.Net can be deployed on any server running Microsoft Windows 2000 SP4 or later. It runs as a virtual directory in IIS and even its look and feel can be customised to integrate with your intranet.