GIS Resources

GeoNet, The ESRI Community
Forum for asking the ESRI community questions, reading others responses, and connecting with others with related interests
Learn ArcGIS
Provides guided lessons on real-world problems, with links to lesson objectives, lesson exercises, and lesson data

ArcGIS Videos
Includes videos to related Esri topics, such as communities, events, lessons, and products
Esri Documentation
Includes links to help documents on ArcMap and ArcGIS Pro
Esri Training catalog
The training catalog enables users to search for software-specific training (ArcGIS Desktop, ArcGIS Server, ArcGIS Online, Developer products, and Mobile GIS), along with the format of training. Multiple free modules are available for those new to GIS.

QGIS
QGIS is a user friendly free and open source GIS desktop software. It runs on Linus, Unix, Mac OSX, Windows and Android.
Google Earth
Google Earth is a virtual globe, map and geographical information program.
GRASS GIS
GRASS (Geographic Resources Analysis Support System) is a free and open source GIS software suite used for geospatial data management and analysis, image processing, graphics and maps production, spatial modeling, and visualization.
uDig
uDig is an open source desktop application framework for GIS data access, editing, and viewing.
GeoServer
GeoServer is an open source server for sharing geospatial data.