Three characters, .org, X-for-Y. O4D reads as opportunity for development, organising for democracy, or outcomes for donors.
Organising for democracy fits the democracy support sector: election monitoring, civic education, and the organisations working on democratic institutions internationally. That’s an established field with substantial multilateral and foundation funding.
Outcomes for donors describes the accountability side of philanthropy, where the constant question is what the money actually achieved.
The 4-as-for convention is standard across all of these fields, which means the name reads as a mission statement rather than as an abbreviation. A reader who has seen a hundred programme names in this shape parses this one automatically, and that inherited legibility is worth more than a clever coinage.
Three characters, permanently scarce, and the extension that matches every plausible buyer.
Offers considered.