Callpage - Turn website visitors into sales calls. Use CallPage and provide immediate free phone callback to your leads in 28 seconds.

Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.

Upcall - Upcall enables you to crowdsource your outbound calls. Collaborate with 1000+ on-demand callers worldwide for sales, marketing and customer support calls. Free trial.

Eventzilla - Eventzilla lets you sell tickets online and manage attendees from one integrated application.

HeyHi.sg - Video call with interactive whiteboard

Attendify - Develop relationships at the events that you attend by creating smaller events with just a few people.