Loomio - Loomio helps groups of people make decisions together, online.
Decidim - Free Open-Source participatory democracy for cities and organizations
Dovetail - Mobile Cloud-Based Dental Software
LiquidFeedback - Online voting system (german & english) for Interactive Democracy, which is used by the Pirate...
Sprig - Delivering locally-sourced, seasonal, sustainable lunches and dinners.
DemocracyOS - DemocracyOS is an open source application for online decision making.