Here's some links:
http://en.wikipedia.org/wiki/Income_protection_insurance https://www.pps.co.za/pages/faq/INCAPACITY.php
A government one, even though you pay for it: http://www.sars.gov.za/TaxTypes/UIF/Pages/default.aspx
Apparently, the US has it as well, though I'm not sure how equivalent to the above it is: http://www.dol.gov/dol/topic/unemployment-insurance/