Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Teleconsole - Teleconsole is a free service to share your terminal session with people you trust.
Event Hunt - Startups and Tech Events Curated By Locals
Shell Notebook - MacOS Terminal, reimagined
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
TermHere - “Open Terminal Here” shortcut for Finder