By way of AidBlog, an interesting graphic:

It comes from a policy brief arguing that large international NGOs should implement the transparency and harmonization that they demand of official development assistance (that is, the kind that comes from governments). Choice quote: “Ethiopia, for example, hosts five separate affiliates of World Vision, seven of Oxfam’s agencies, six of Care International’s and twelve of Save the Children, many of which even open separate offices in the country.”