http://www.kiwanisbikes.org/
Reno Sparks is a bike program offering bikes to people who can't afford them, similar to the Bike Station in Edinburgh. They also offer bikes from $30 at Burning Man.
http://www.pedalpower.org.za/
The Pedal Power Association is a Cape Town based cycling group. The organise fun rides, cycling awareness and other general cycling promotion. Similar to Spokes in Edinburgh.
