From the homepage:
Open Debate is an online consultation tool that helps you to engage with a broad audience in an accessible, convenient, interactive and auditable way.
It can be used for multiple consultations, allowing you to manage website content, view feedback and contact participants from one central system. It also generates instant reports and enables you to immediately see how your consultation is going.
For a quick summary on Open Debate, view their info sheet.
Open Debate is developed by Consense based in Suffolk, UK.