EventSpot is a tool that allows you to create events that you can track. Track how many people are registered. Analyze the number of people who have paid for your event. Print tickets for your events and send follow up emails to people who will attend your event.
If you host events of any kind (speaking engagements, webinars, teleseminars, garage sales etc.), use EventSpot to measure your level of engagement with the people who are interested in your events.