Fountain Greetings - Handwritten cards. Curated gifts. Right at your fingertips.

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

Thankster - Automagically send hand written cards

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

Bond - A simple app that reminds you to keep in touch with people

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