Kommunity - Explore communities that share your passion with millions of people
Tribe.so - Tribe is a white-label platform, empowering the new generation of online communities.
Facebook Groups - This app gives you a dedicated space for you and your groups
Higher Logic - Private, secure online communities that stimulate conversation and ignite engagement.
MemberSpace - MemberSpace lets users create online course, training program, or other business idea inside existing Squarespace website.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.