GIS

https://en.wikipedia.org/wiki/Geographic_information_system

Lounge
http://www.gislounge.com/

Q
http://www.qgis.org/

Diva
http://www.diva-gis.org/

Esri
http://www.esri.com/

Report
https://www.gisreportsonline.com/

Tube
https://www.youtube.com/results?search_query=GIS

Slides
http://www.slideshare.net/search/slideshow?searchfrom=header&q=GIS