Founderfox - Founderfox makes pitching your startup easy and fun, create pitches anytime, anywhere.
Tribe.so - Tribe is a white-label platform, empowering the new generation of online communities.
GoToPitch - GoToPitch.
Higher Logic - Private, secure online communities that stimulate conversation and ignite engagement.
IdeaSpies - Sharing ideas that do good
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.