There are a range of players involved in the development process:
World Bank / IMF
These two IGOs lend money to the developing world – essentially funding development, and as part of this process guide economic policy (the IMF). Much of the developing world’s debt is owed to the IMF and WB.
Invest in the developing world e.g. building factories; Foreign Direct Investment tends to flow to low cost locations, but where people are educated and skilled; Africa’s share of FDI is therefore small.
Monitors the MDG, but has many component organisation which focus on development (UNDP), health (WHO), food and farming (FAO) and environmental issues (UNEP); often involved in disaster relief as well as longer
Developed world governments provide funding for the UN, IMF and WB. They also provide bi-lateral aid the developing world in the form of Official Development Assistance (ODA). Developing World governments manage their countries path to development.
Charities and not-for-profit organisations provide aid to the developing world, often in a smaller, more localised way compared to Governments and IGOs. Some NGOs receive government funding
As consumers and voters, individuals can alter government policy both in the developed and developing world; community led development in becoming more common; developed world consumers may support fair trade.