From the website:
How it works
* Create a new discussion and invite members to solve a challenge or reach a goal.
* As members submit ideas, Synapp facilitates discussion by prompting the community for feedback using a variety of simple actions.
* Collectively, these actions help discover top ideas, collect diverse opinions, and connect relevant people and ideas.
* The end result is smarter, innovative communities full of passionate, engaged individuals.
SynApp is a project coming out of Stanford University. As of April 2015, the tool is in beta.