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/

Data portals and spatial information sources

Province of the Eastern Cape Spatial Information Website

Provincial GIS information

http://gis.ecprov.gov.za/

Municipal Demarcation Board

Updated demarcation and boundary information

www.demarcation.org.za

Chief Surveyor General

Provision of cadastral information and survey document.

www.csg.dla.gov.za

CSIR

Geospatial Analysis Platform

http://www.gap.csir.co.za/

Environmental spatial information
http://soer.deat.gov.za/669.html