What is it?
Polly is a liquid democracy system with a focus on deliberative policy building and consensus finding.
Why do we need it?
Representative democracy suffers from obvious problems where power gathers around an elite few, in turn attracting corruption. Historically this has had to be countered by endless manual 'checks and balances' which led to the grossly inefficient governments we see before us, while the alternative participatory democratic processes have always been limited in scope because of the overheads of operating them in anything other than a small scale (scaling with square of number of participants).
Where can I get it?
Right now Polly is under active development. You can find the source code on GitHub.