The Liquidizer system is designed to make group decisions as easy and as effective as possible. A public instance can be accessed here.
Preferences for each question can be cast between -3 and 3. A limited voting weight will be distributed on the selected issues according to the preferences. Updated results will show up immediately after clicking and can be revised at any time later.
The preference match between all users is visualized with emoticons. Conflicting positions can be detected quickly and possibly resolved with discussion.
The Liquidizer provides quick access to all of your settings and your voting behaviour. At any time you can revoke your positions. No history is saved in the system.
You can find more documentation on the help page of the Liquidizer.