HEY - Email at its best, new from Basecamp.

Hop - Spike makes working easier and more efficient. Saving you and your team time, sanity, and a lot of headaches.

InstAddr - Disposable email address application.

Funnster - The best way to get together with your friends and family

Horde - Horde Groupware is a free, enterprise ready, browser based collaboration suite.

Gigstarter - Gigstarter uses crowd funding to take the pain from arranging events.