Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
UXpin - Design is really about solving problems. UXPin is the UX Design Platform that gets that right.
Event Hunt - Startups and Tech Events Curated By Locals
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Moqups - The most stunning HTML5 app for creating resolution-independent SVG mockups, wireframes & interactive prototypes for your next project