Hi Product Hunt,
Thanks for having us here :)
We’ve built an open source solution called Cocorico that allows you to build your AirBNB, Drivy or BlaBlaCar. It’s already been used on several service and rental marketplaces such as WeFarmUp.com, TheHaircut.com, and Communivy.com (more examples here http://bit.ly/1tudkj2).
Cocorico has all the features to optimize rental and service based transactions between users, amongst which escrowing, availability management and user ratings.
We had been building marketplaces for a few years (MisterBNB, Sailsharing, Sejourning…) when we decided it was time to return to the open source community a little something. And thus Cocorico was: born: https://github.com/Cocolabs-SAS/...
You can start tweaking it and making your own Airbnb and Blablacars for anything. We hope to release a plugin store in the near future where you will be able to share your work and improvements and also benefit from the plugins of others in your marketplace.
Excited to see what your ideas and suggestions are!
Cocorico
lemcal