Mr Mugabe used the meeting to respond to criticisms of him led by Britain at the Commonwealth summit, when Zimbabwe withdrew from the organisation.
His speech stood out from the mostly bland interventions of other world leaders at this internet summit.
They generalised about the great potential of internet technology and the need to spread these advantages to the developing world.
Mr Mugabe, by contrast, said there could be no just information society without more social equality.
The IMF has started "compulsory withdrawal procedures" over Zimbabwe's failure to pay its arrears. These amount to $273m.
According to IMF figures, the Zimbabwe economy contracted by 40% between 1999 and 2003 and inflation in October this year was at 526%.