KMailAssistant - Collaborative email management tool embedded into Outlook.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
Cvent - Cvent's event management software provides event planners with a complete solution to increase event attendance and decrease event costs.
Hiver - Manage Customer Support, Sales and Projects right from your Gmail inbox. Collaborate with Shared Labels, Shared Contacts, email notes, email reminders and email templates
Ticket Tailor - Ticket Tailor is an easy-to-use event ticketing platform that allows event organizers of all shapes and sizes to sell tickets online.