SquidNT was a port of the Squid proxy server to Microsoft's Windows NT-based operating systems. The SquidNT effort has since then been merged into the main Squid project (September 2006) and is maintained by Guido Serassio, one of the core developers of Squid. The name SquidNT is still often used for referring to Squid running on Windows but is not an official name.