Meeting Star
Lightweight, inexpensive alternative to meetup.com.
20 Alternatives To Meeting Star
Agorakit
Agorakit is web-based, open source groupware for citizens.
BlinkMeet
BlinkMeet is a meetups management application which allows you to easily administer online…
Collaborizm
Meet New People. Build Amazing Things. A workspace for aspiring Entrepreneurs, Engineers, and Creatives.
Confetti
Confetti is the all-in-one tool for all your conferences, festivals, workshops and social events.
DownToMeet
DownToMeet is a platform to organize, find, and attend group events.
Eventbrite
Eventbrite - Discover Great Events or Create Your Own & Sell Tickets
Eventpeg
Global meet-up site with $12/yr Organizer fees. File uploads, group albums, events & more. Public, private & hidden groups. Better alternatives to meetup.com
GroupSpaces
Free Group Website, Membership Database, Listserv Mailing List, Online Group Management Software : GroupSpaces
Mailman
Mailman is free software for managing electronic mail discussion and e-newsletter lists.
Meetup
Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Mobilizon
A free and federated tool to get our events off Facebook
Ning
Ning is the social platform for the worlds interests and passions online.
OpenSports
Used by thousands of sports groups around the globe, OpenSports is the gold standard for managing events, attendees, and payments.
Openki
Platform where you can search, propose, take part, help organize or publish workshops, lectures…
SportEasy
SportEasy is an awesome app to communicate with your team and organize your games and practices…
Team App
Team App is a platform that allows teams and groups to improve communication by creating their very own smartphone app.
Teamstuff
A free and fully featured app and web platform for managing teams and clubs.
The Groups Place
The Groups Place is a new alternative to Meetup.
TidyHQ
Organization management tool to support membership, subscriptions, event planning, and outreach.