Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
HTTrack - HTTrack is a free (GPL, libre/free software) and easy-to-use offline browser utility.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
SiteSucker - SiteSucker is a Macintosh application that automatically downloads Web sites from the Internet.
Bylde - Bylde is a SaaS platform you can use to Start, Manage and Grow your groups and communities.
Offline Explorer - MetaProducts Offline Explorer is a Windows NT/2000/XP/2003/Vista program that allows you to...