From Twitter I learned about this list of cultural Non-profit crowdsourcing projects. I’m amazed there are so few, but some of that is that many projects are probably not listed, or failed early on.
The New York Public Library has another cool digital project called the Building Inspector. They are crowdsourcing the training and correction of a building recognition tool that is combing through old maps. You see a portion of a map with red dots outlining a building and you click “Yes” (if the outline is correct), “No” (if it is wrong), and “Fix” (if it is close, but needs to be fixed.)
They also have a neat subtitle to the project, “Kill Time. Make History.”