Here’s my new service: http://gratis.thijsbroenink.com. It shows all advertisements from the Dutch marketplace Marktplaats that are given price tag: FREE, sorted by newest first. So this could be useful for anyone that’s interested in for example a second-hand sofa set or just wants to see what’s been given away for free.
You can sort by category or select a city to filter on.
It uses the Marktplaats API to get the latest advertisements. I parse all json output and use Justified-Gallery, a jQuery addon, to create the grid.
Full code is available on GitHub.