HEY - Email at its best, new from Basecamp.
Zoho Meeting - Free video conferencing, online meeting, desktop sharing solution from Zoho.
Horde - Horde Groupware is a free, enterprise ready, browser based collaboration suite.
Airtime - Hang out with group video, share music & videos
InstAddr - Disposable email address application.
Voxox CloudPhone - Get a local or toll-free business number that automatically answers, routes and transfers calls, plus other professional business phone services.