The latest stable release of OSGeo-Live 7.9 :
osgeo-live-7.9.iso : 4.3 GB
An Xubuntu based bootable DVD, which also includes windows and mac installers. It can also be copied to an 8 GB bootable USB thumb drive. Verify your download with its md5sum checksum (osgeo-live-7.9.iso.md5).
osgeo-live-mini-7.9.iso : 3.4 GB
Same as osgeo-live-7.9.iso, except it doesn’t contain windows and mac installers and can be copied onto a 4 GB bootable USB thumb drive. Verify your download with its md5sum checksum (osgeo-live-mini-7.9.iso.md5).
osgeo-live-vm-7.9.7z : 2.8 GB
Premade 7-Zip compressed virtual disk (.vmdk) suitable for use in VirtualBox, VMWare, KVM and other virtual machine applications. Does not contain windows and mac installers. Verify your download with its md5sum checksum (osgeo-live-vm-7.9.7z.md5).
For a full list of versions, download options and mirrors visit: http://download.osgeo.org/livedvd
[*] Minimum suggested system resources: 768MB RAM (1 GB is better for trying Java based applications), 1GHz i686 compatible CPU. No hard drive required. Mac users will benefit from a 3-button USB mouse. For installation onto a USB stick an 8 GB thumb drive is recommended.