I'm curious to learn more about vikings exploring Africa. I know they explored North Africa, are there any credible sources that provide more information and is there any evidence that they might have visited South Africa?
Regarding the South African part of your question, Europeans generally didn't explore the West African coast south of Cape Bojador (just south of the canary islands) until a Portuguese expedition under Gil Eanes passed the cape in 1434, with Portuguese sailors reached today's South Africa around 50 years later. The introduction of the caravel, a ship that could sail close to the wind, was important in this.
Angus Maddison says "In west Africa, Roman ships did not venture beyond Cape Bojador (just south of the Canary Islands), because the prevailing winds made a return journey impossible." (Maddison 2007, p. 187)
There's no evidence the Norse were any different in this respect.
However according to Herodotus (The Histories 4.42), a Phoenician expedition had circumnavigated Africa anticlockwise from the Red sea, and the Carthaginian navigator Hanno the Navigator is reported to have sailed down the West African coast past Cape Bojador according to a few sources, and even to have completed a circumnavigation himself, according to Pliny's Natural History. The accuracy of these sources is contested, especially the circumnavigation accounts. So the barriers to the Norse in exploring Africa may not have been technological.
Herodotus. 'Histories'
Maddison, Angus (2007). Contours of the World Economy 1-2030 AD. OUP
Piggybacking on this comment, a Scottish friend stated that the Norse helped transport Scotts to fight in Africa, is there any truth to this?