Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Anedot - Powerful giving tools made easy for everyone
Event Hunt - Startups and Tech Events Curated By Locals
Tiltify - Streaming. Fundraising. Interact with your community for the causes you are passionate about.
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
GivingTools - GivingTools is one of the high-class websites that aid you to make your own fundraising sites for easy online donations and have the ability to cover the processing costs, making you maximize productivity.