Crowdcrafting

http://crowdcrafting.org/

CrowdCrafting is a free, open-source crowd-sourcing and micro-tasking platform powered by the PyBossa software.

This platform enables people to create and run projects that utilize on-line assistance in performing tasks that require human cognition such as image classification, transcription, geocoding and more.

CrowdCrafting is there to help researchers, civic hackers and developers to create projects where anyone around the world with some time, interest and an Internet connection can contribute.