Quantum GIS (QGIS)
How Do I Do That in QGIS? – How to perform basic GIS operations in QGIS
QGIS Tutorial and Tips – Support: Quickstart, Basic/Intermediate/Advanced GIS Operations, Scripting, Web Mapping
QGIS – Short Videos Tutorials – Support: Projections, Raster Analysis, GIS Map Composer and GPS Integration
Creating Simple Maps in QuantumGIS (University of Waterloo – Geospatial Centre)
QGIS Workshop – Shuffling Quantum GIS into the Open Source GIS Stack
MakePath
MakePath A continuously updated list of open source GIS software over the last 40 years till date.
OpenStreetMap
Video Tutorials – Working with OpenStreetMap (openstreetmap.org)
TatukGIS
Creating Simple Maps in TatukGIS (University of Waterloo – Geospatial Centre)