Install QGIS

The fastest and easiest way is to download  OSGeo-Live

it’s a self-contained bootable DVD, USB thumb drive or Virtual Machine based on Xubuntu, that allows you to try a wide variety of open source geospatial software

http://live.osgeo.org/en/index.html

Presentation

It has tons of free open source Geospatial Tools

Desktop GIS – Like QGIS, gvSIG, UDig, OpenJump, SAGA, Grass

Browser Facing GIS – Open Layers, Leaflet, Mapbender, MapFish, GeoMoose, Cartaro, GeoNode

Web Services to publish Spatial data to the internet – GeoServer, MapServer, Deegree, ncWMS, EOxServer, GeoNetwork, pycsw, MapProxy, QGIS Server, TinyOWS, ZooProject

Data Sources – PostGIS, Spatialite, Rasdaman, pgRouting

Navigation and Maps – GPSDrive, Prune, Marble, OpenCPN, Open Street Map, Viking

Spatial Tools – Geokettle -ETL Tool, GMT, Mapnik, TileMill, MapTiler, OSSIM-Image processing, ORFEO Toolbox-Image Processing, R Stats

Geospatial Libraries – GDAL/OGR, JTS, GeoTools, GEOS, MetaCRS, LibLAS, Iris

I recommend using the PreMade Virtual Disk (VMDK) for use in Oracle VM VirtualBox  http://download.osgeo.org/livedvd/release/7.9/osgeo-live-vm-7.9.7z/download and it runs great.

 

You can also Install QGIS on your existing Operating System (Windows, Linux or Mac OS X)  http://www.qgis.org/en/site/forusers/download.html

Download

Getting Started

http://www.qgis.org/en/docs/user_manual/introduction/getting_started.html 

Install Videos