Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Newsletter Operating System - All-in-one dashboard to launch & grow your newsletter
TechEvents.co - Tech and startup events aggregator
LetterHunt - LetterHunt connects you to 10,000+ niche, active newsletter writers to promote your product.
Facebook Local - Discover places to go and events happening near you
Unzip.dev - Discover the latest developer trends