Loomio - Loomio helps groups of people make decisions together, online.
buckets.co - Feature rich kanban board collaboration platform.
DemocracyOS - DemocracyOS is an open source application for online decision making.
TaskBoard - A Kanban-inspired app for keeping track of things that need to get done.
CivilHub - CivilHub is a free and open-source platform written in Python & Django for the purpose of...
Pintask - Pintask is the most customizable Kanban board.