AnnounceBot - Onboard new hires and wish them their birthdays, anniversaries, and special occasions
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Range - Coordination tools that teams actually love
Event Hunt - Startups and Tech Events Curated By Locals
DEED - On-demand app that makes volunteering easy, social and fun!
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets