If you don't yet have a System Access Mobile Network account, you'll be able to sign up for a free trial or a subscription at the end of the System Access installation process. System Access will run as a 20-minute demo until you log into the SA Mobile Network, at which point the 20-minute restriction will be removed and your 30-day trial will begin.
The latest version of System Access is System Access 2.5. This is a typical Windows installer, except that if you're not running a recognized screen reader, the installer will provide its own speech output. Simply download it and run it. If you prefer, you can also download an installation CD ISO 9660 image or an installation CD image as a ZIP file. The installation CD images include Document Scan and NeoSpeech VoiceText in addition to the base System Access package.
You can also download the source code and modifications to some open-source packages we use, most notably Mozilla.