Sidekick by Hubspot - Customer insight integrated with your email tools.
Attendify - Develop relationships at the events that you attend by creating smaller events with just a few people.
HiHello - Exchange contacts, seamlessly.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Sansan - Sansan provides a internal contact sharing service for companies.
Prekindle - Prekindle is a simple yet powerful event management, ticketing, and marketing platform that helps businesses to sell tickets to the event online and spread the word.