Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
UptimeRobot - Free Website Uptime Monitoring
Event Hunt - Startups and Tech Events Curated By Locals
StatusPage.io - StatusPage.io is the best way for web infrastructure, developer API, and SaaS companies to get set up with their very own status page in minutes. Integrate public metrics and allow your customers to subscribe to be updated automatically.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
FreshStatus - Better status pages in 1-click, FREE FOREVER