The GIVE software is open source and can be freely downloaded from our Google Code project website.
You may also want to take a look at our EACL 2009 demo paper describing the software architecture.
There is a GIVE participants discussion forum, which we use to let you know about any news related to the challenge and where you can discuss software issues with us and other participants. Finally, the GIVE wiki is a place for collecting documentation. All members of the GIVE forum have the right to edit those pages and are encouraged to add to the documentation that is already there.