BlackWidow

BlackWidow by SoftByte Labs Inc. scans websites (it’s a site ripper).

HTTrack

HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility.

Offline Pages Pro is probably the world’s most advanced offline browser.

SiteSucker is a Macintosh application that automatically downloads Web sites from the Internet.

SurfOffline is a fast and convenient website download software.

Teleport Pro is an all-purpose tool for getting data from the Internet.

WebCopier is an easy-to-use website mirror utility.

Cyotek WebCopy is a free tool for copying full or partial websites locally onto your harddisk for offline viewing.

Download source code from any website