MSKLC

Microsoft Keyboard Layout Creator. A software for designing keyboard layouts for diverse language needs.

See http://www.microsoft.com/globaldev/tools/msklc.mspx

List of MSKLC layouts for African languages or groups of languages:

• Kasahorow "Gbe" keyboard https://kasahorow.org/node/47
• Open Road: Harari (Latin) http://www.openroad.net.au/languages/african/harari/keyboards.html (scroll to bottom of page)
• others...