SADC

The South African Development Community (official website here), is headquartered in Gaborone, Botswana and consists of 15 African member nations in Southern Africa.

Previously, the SADCC (Southern African Development Co-ordination Conference, SADCC), SADC works towards improvements in several broad economic and social sectors, namely, Energy, Tourism, Environment and Land Management, Water, Mining, Employment and Labour, Culture, Information and Sport and Transport and Communications. Other sectors are Finance and Investment, Human Resource Development, Food, Agriculture and Natural Resources, Legal Affairs and Health.

From Wiki: SADC's 15 member states are:

• Angola
• Botswana
• Lesotho
• Malawi
• Mozambique
• Swaziland
• Tanzania
• Zambia
• Zimbabwe
• Namibia - since 31 March 1990 (since independence)
• South Africa - since 30 August 1994
• Mauritius - since 28 August 1995
• Democratic Republic of the Congo - since 8 September 1997
• Seychelles had also previously been a member of SADC from 8 September 1997 until 1 July 2004 than joined again in 2008.

Suspended

• Madagascar