Kialo - Kialo is the platform for rational debate. Empowering reason through friendly and open discussions.
Loomio - Loomio helps groups of people make decisions together, online.
DebateIsland - DebateIsland.com is a leading online debate platform which uses A.I. to revolutionize online debating. The site features numerous debating formats including Casual, "Persuade Me," Formalish, Formal Traditional Debating, and Lincoln-Douglas Debating.
DemocracyOS - DemocracyOS is an open source application for online decision making.
DebateArt.com - DebateArt is a unique and growing community committed to the idea of exchanging views and perspectives through debating.
Airesis - A decision making tool for direct democracy and e-government: participate in discussions, bring your ideas, suggest solutions and vote online