Loomio

Loomio is decision-making software and web service designed to assist groups with collaborative, consensus-focused decision-making processes. It is a free software web application, where users can initiate discussions and put up proposals. As the discussions progress to initiating a proposal, the group receives feedback through an updatable pie chart or other data visualizations. Loomio is basically a web based forum with tools to facilitate conversations and decision-making processes from starting and holding conversations to reaching outcome.

Excerpt from Wikipedia: Loomio. Content available under CC-BY-SA 4.0.