Update:

Found the site http://bitcoinafrica.io with a pretty large list of companies. I added those to the list that have a working website. Unfortunately, some of them have unavailable websites (their list may be a bit older):

https://www.bitland.world/ - Ghana, land property registry based on the blockchain
http://www.dreambitcoinfoundation.org/ - Blockchain services and merchant solutions - Ghana
http://www.pmcedi.com/ - wallet/exchange for different digital currencies, Ghana
https://bitsoko.io/ - Mobile wallet provider - Kenya
http://www.umati.io/ - Blockchain advisory firm - Kenya (unknown vhost)
http://cubebucks.com/ - Mobile wallet service, South Africa

If you know the fate of one or more of these companies or possible new sites/alternatives, you can post here.

(PS: Bitland works, only that it is reported as insecure when accessed via HTTPS. Added it above.)