Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.

Zoho Meeting - Free video conferencing, online meeting, desktop sharing solution from Zoho.

Eventbrite - Discover Great Events or Create Your Own & Sell Tickets

Airtime - Hang out with group video, share music & videos

Bigtent - BigTent is a web-based organization and communication portal for groups.

Voxox CloudPhone - Get a local or toll-free business number that automatically answers, routes and transfers calls, plus other professional business phone services.