Diigo - Diigo is a powerful research tool and a knowledge-sharing community
HTTrack - HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility.
Unmark - Hosted bookmark management app
GNU Wget - GNU Wget is a free software package for retrieving files using HTTP(S) and FTP, the most...
Shaarli - Shaarli is a minimalist link sharing software you can install on your own website
SiteSucker - SiteSucker is a Macintosh application that automatically downloads Web sites from the Internet.