@StillIRise1963 My local buy nothing group (on facebook, ugh) does a bit of this. I've had people stop by to use my bike pump on sports balls and loaned out my fancy dishes for a tea party themed baby shower.
The later was kind of fun since she sent me photos of the table set-up and I never use the sugar bowl/candlesticks/etc so it was cool to see someone use it all.
A system that didn't involve facebook or proprietary smartphone apps would be great though.
samhainnight