Calendify - Calendify is an event community where you can share, publish, and subscribe to event calendars. It helps you to stay informed about what you are interested in and what is yet to come.
Speaker Directory by HeySummit - Guests for your next event or podcast (or submit yourself!)
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
PodKoi - Find podcasts to be interviewed on & guests to interview.
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Suggest a Guest - Easily suggest a guest for your favorite podcasts