https://ru.wikipedia.org/wiki/%D0%A1%D1%83%D0%B1%D0%B1%D0%BE...
Better if it targets a wider scope (eg. community-building) than just cleanup.
https://en.wikipedia.org/wiki/Corv%C3%A9e
alt Hacker News
https://ru.wikipedia.org/wiki/%D0%A1%D1%83%D0%B1%D0%B1%D0%BE...