Free software projects in/from Australia
ANUGA (also on sourceforge) - software hydrodynamic model implementations used for modelling the impact to communities from hydrological disasters such as tsunami, flooding, dam breaks and storm surge.
Serval Project - mesh-based mobile communications network
Squiz Matrix - content management system [ Squiz announced licencing under the GPL, though it does not apply to some of their other projects, and the licences are not clearly displayed on the site - The licence is clearly available in the source ]
Digital Preservation Software Platform collection of tools used in the preservation of digital archives
Codec2 low bandwidth voice codec
NMIS network management information system