ArcGIS Online
http://www.arcgis.com/home/
Google Earth
Google GIS data viewer - application
http://earth.google.com/
QGIS
Open source GIS
http://www.qgis.org/
PostGIS
Open source spatial data enabler for the PostgreSQL database
http://postgis.refractions.net/
Inkscape
Open source vector drawing software
http://www.inkscape.org/
GIMP 2
Open source raster photo software (like Photoshop)
http://www.gimp.org/
Open Office
Open source Office - suit of tools
http://www.openoffice.org/
Province of the Eastern Cape Spatial Information Website
Provincial GIS information
Municipal Demarcation Board
Updated demarcation and boundary information
Chief Surveyor General
Provision of cadastral information and survey document.
CSIR
Geospatial Analysis Platform
Environmental spatial information
http://soer.deat.gov.za/669.html