Abitur past papers
Germany, from the Bavarian state institute. Each course below lists the papers its board has published, and each paper opens straight from the board's website with its mark scheme beside it.
ISB Bayern
Every other level and board is on the past papers search.
cookie is independent and is not affiliated with or endorsed by any exam board. Every paper here is a link to the board's own copy on its own website, and the papers belong to the boards that set them. If a link has stopped working, the board's own past paper page is linked on each course.