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
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
LiveAgent - LiveAgent is a fully-featured web-based live chat and help desk software. It harnesses the power of a universal inbox, real-time live chat, built-in call center, and a robust customer service portal. Start your free 1 month trial today!
Event Hunt - Startups and Tech Events Curated By Locals
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets