Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Purrge - Delete iOS photos faster with drag-to-select & upward swipe
Event Hunt - Startups and Tech Events Curated By Locals
Gemini Photos - Clean up your Camera Roll
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
PickStackr - Organize and manage your camera roll