Quick anonymised dump from https://code4africa.slack.com/messages/general/
I saw statsSA host a open data site of sorts, but there's no info about it that I could find, will keep digging
Also, it ain’t a policy as such, but X is helping drive digitalisation of municipal bylaws by local volunteers through the excellent http://openbylaws.org.za/ initiative. You might want to sign-up for some of the cities you mentioned above?
this is a good start: http://opendatahandbook.org/
ekhurleni has an open data portal
and WITS has established a tech hub / data science lab
there is also the GCRO http://www.gcro.ac.za/ that releases economic spatial analysis
The Innovation Hub in pretoria works closely with DPSA and Code4SA on open data projects
Cape Town has an open data policy and portal
Durban is currently working on their policy which should be released for public comment this month
this is the wits hub http://openwits.co.za/
I had a chat to one of the guys setting it up, they are apparently very interested in open data/civic tech