Really Good Emails - A large collection of good product email design.
EventTitans - Top rated event management software
Good Sales Emails - Best sales emails from great companies
Tix - Tix is a state-of-the-art, cloud-based ticketing system that features fully integrated access controls, event management controls, multi-channel distribution capabilities, and a robust reporting suite.
Great Email Copy - A dose of emails from around the web.
Brushfire - Brushfire offers tools for online registration and event management.