For my bachelorproef I worked together with Gert-Jan Wille on a platform for Buda vzw. We worked on the Buda-coin, a community currency which will be realized in a few years. We figured out a platform where people can post messages to ask for help or to offer help to someone on Buda-island. We also provided some activities where you can earn coins (riding with an electricity driven bike, playing games and gambling and cleaning the streets). This all got executed in the form of a website and an app. We also provides a poster, window stickers and a concept video as a bonus.
If you want something similar for your organization, you can contact us on email@example.com.