There's this Berlin-based think tank called the Global Public Policy Initiative (GPPI). Their website says they are an "independent" institute, which in layman's terms means they're trying to obfuscate who funds them.
The Wikipedia page for the GPPI doesn't say where the funds come from (but does links it to the German Marshall Fund, which may be a clue).
My question: Who funds the GPPI? Directly, and possibly indirectly if it's by other funds with vague-sounding names?