The open-source Elasto Mania: a motorbike, gravity, and levels the community has been drawing since 2005.
Transport Tycoon Deluxe rebuilt as open source and still patched: bigger maps, better trains, no bankruptcy screen.
Take an app, a plugin or a piece of open source and localise it properly - the strings, the dates, the plurals - then send the translation upstream.
Infobox
