I recall seeing some Minneapolis candidate materials mentioning Participatory Budgeting (PB).
Did any of those candidates win?
I happen to be at a conference with both the city staff that run and the technology nonprofit that power Better Reykjavik.
Info in English:
Try it live (English version) and you can select a neighborhood and then spend your budget (vote) on the community improvement projects of interest all they way through until the end where you probably can't verify your identity as a local resident:
There is a toggle to switch to English. Just select any neighborhood.
A few key things I learned:
1. There is a process to select, vet, and document the proposals that directly involve the neighborhood groups.
2. It is binding on 12% of their community improvements budget.
3. They aggressively use online advertising to reach lots and lots of people.
Anyway, if someone in city hall or the community would like have folks with this project do a web meeting presentation, etc. they are game.