What is the official name for the wealthy member states in the UN who often donate money and supplies?

Question

I understand the terms developed/undeveloped or third.world.nation but I think there might be another out there...

Answer 1

There's the G-8 which is the riches 8 countries in the world.  Each country generally has an ODA (Overseas Development Assistance) program.

There's Organisation for Economic Co-operation and Development (OECD) which are comprised of the next level of wealthy countries.  They too provide some assistance.

There's also the Paris Club which is an informal group of financial officials from 19 of the world's richest countries that provides financial services such as debt restructuring, debt relief, and debt cancellation to indebted countries and their creditors

Answer 2

I believe in modern history it has been referred to as the "G-6,G-7,G-8" as members have been added.