Founded in 2009 in Berlin, the Liquid Democracy association has been developing an impressive array of open source software tools that support civic and political participation in youth projects, urban planning projects, participatory budgeting, NGOs, political parties, and institutions.
The best known of these tools is Adhocracy, a modular decision-making platform that allows participants to collect ideas, discuss them, and refine them in text propositions that can be further amended. This modular structure has been mostly used in civic participation projects in Berlin, but also in political parties such as the Green Party, the SPD, and institutional contexts such at the German Federal Parliament.