A geolocated index of offers and wants posted to various platforms. The ads are stored anonymously, and contact request are routed back through their platform
The platforms report their members' ads and can interrogate the index. This was first designed for LETS and timebanks to be interoperable, but I believe should find application helping the whole solidarity economy out of its software silos.
Ideally this would be built on a blockchain so there wouldn't be governance issue but for now Community Forge is hosting the only instance.