Change.org is a popular website whose purpose is to promote petitions it is aimed and the general public and aims to give ordinary citizens the ability via a crowd sourced approach to get support for their particular projects. Many Governments around the world have a policy of responding to citizens petitions provided they have reach a critical mass of supporters. Switzerland for example puts all major decisions out to the public to vote on. The UK Government to a lesser extent pledges to arrange parliamentary debates if there is enough public support.
The site also has a community area where its possible to publish post like this one for example
Not sure how useful a site like this is but the idea if certainly democratic!
Another example is here interesting topic!