The Ethics Institute of South Africa said on Wednesday that ANC Deputy President Cyril Ramaphosa set an excellent example for other politicians to follow.
Ramaphosa resigned from company boards to avoid a conflict of interest.
On Wednesday, mining firm Lonmin and paper producer Mondi confirmed that he was stepping down as a director of both companies.
The institute's CEO Deon Roussouw said: "The moment you get decisive action and people setting the right tone, others in the vicinity start to follow. I think that's one of our biggest challenges in South Africa at the moment."
The DA has stood for the truth and reconciliation in South Africa, says party leader Helen Zille.
Julius Malema's cabbage and tomato farm in Limpopo is set to go under the auction hammer.
The launch of South Africa's latest political party is evidence of the unease within the ruling ANC.
