Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Loomio - Loomio helps groups of people make decisions together, online.
Leantime - Lean project management for startups & small teams
DemocracyOS - DemocracyOS is an open source application for online decision making.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
CivilHub - CivilHub is a free and open-source platform written in Python & Django for the purpose of...