Free On-line GIS Journals:

Geo:connexion magazine: http://www.geoconnexion.com/  

GeoPlace: http://www.geoplace.com/

GEOInformatics: http://www.geoinformatics.com/  

GeoSpatial Solutions: http://www.geospatial-solutions.com/

GIS Professional/Geomatics World: http://www.pvpubs.com/magazines.asp  

GIS User: http://www.gisuser.com/  

Directions Magazine: http://www.directionsmag.com/

Location Intelligence: http://www.locationintelligence.net  

GIS@development: http://www.gisdevelopment.net/

GIS Lounge: http://gislounge.com/  

GIS Café: http://www.giscafe.com/  

Vector1: http://vector1media.com/vectorone/

Vector1: http://www.vector1media.com/

Free On-line GIS Books:

Geospatial Analysis - a comprehensive guide. 2nd edition © 2006-2008 de Smith, Goodchild, Longley:

http://www.spatialanalysisonline.com/output/

Free On-line GIS Data to view & downlod:

http://partners.wygisc.uwyo.edu/website/dataserver/viewer.htm

http://datagateway.nrcs.usda.gov/NextPage.aspx  

http://wgiac2.state.wy.us/html/www.asp  

http://clearinghouse4.fgdc.gov/registry/clearinghouse_sites.html  

Free On-line GIS Data to view:

http://maps.live.com/

http://maps.google.com/

http://www.microsoft.com/virtualearth/

http://www.londonprofiler.org/

http://gos2.geodata.gov/wps/portal/gos

http://partners.wygisc.uwyo.edu/website/cm/viewer.htm

 
Free On-line GIS Data to downlod:

http://edcsns17.cr.usgs.gov/srtmdted/  

http://www.hgk.mil.tr/urunler/veriornekleri.asp

Free & Open Source GIS Software (19.05.2008):

GRASS (6.3)
=> Web  Site: http://grass.itc.it/ 
=> Download: http://grass.itc.it/download/index.php

Quantum-GIS (0.10)
=> Web  Site: http://www.qgis.org/ 
=> Download: http://download.qgis.org/downloads.rhtml

ILWIS (3.4)
=> Web  Site: http://52north.org/
=> Download:  http://www.birdlist.org/downloads/ilwis/52n-ilwis-v3-04-02-win32.zip

GAIA (3.1)
=> Web  Site: http://www.thecarbonproject.com/gaia.php
=> Download:  http://www.thecarbonportal.net/downloads/Gaia/ver.3.1/Gaia3.1_Setup.msi

GvSIG (1.1)
=> Web  Site: http://www.gvsig.gva.es/index.php?id=gvsig&L=2
=> Download:  http://www.gvsig.gva.es/index.php?id=1729&L=2
  
MapWindow GIS (4.0)
=> Web  Site: http://www.mapwindow.com/
=> Download:   http://www.mapwindow.org/download.php

SAGA (2.0.1)
=> Web  Site:  http://www.saga-gis.uni-goettingen.de/html/index.php
=> Download:   http://sourceforge.net/project/showfiles.php?group_id=102728

OpenMAP (4.6.4)
=> Web  Site:  http://openmap.bbn.com/
=> Download: http://openmap.bbn.com/src/openmap-4.6.4.zip