Current Version 5.8.1
Portable GIS is a windows-only set of open source GIS packages ready to install or copy onto a USB stick, and run with no additional configuration.
Desktop GIS packages QGIS version 2.18.11 LTR
FWTools (GDAL and OGR toolkit)
Apache2 and Php5
PostgreSQL (version 9.1)/Postgis (version 2.1)
Mapserver 5.6 and 6, OpenLayers.
Python 2.7 with GDAL 1.9 libraries and Psycopg2
Loader- for loading gml such as Ordnance Survey Mastermap into a PostgreSQL Database
Utilities- portable firefox, pdf reader and text editor
Suggestions for additional software to include are always welcome, but inclusion may not always be possible due to build or logistical concerns.