Lots of the programs in the AudioQuake area of the repository are documentation and build scripts. They can all be built on UNIX, provided you have the requisite tools (the only potentially exotic requirement is a DocBook XML installation and an XML/XSLT processor). You will also find an Inno Setup script for creating installers on Windows.
It is possible to compile DocBook documents on Windows, but the set-up of the various tools required is laborious. We have previously done this and may be able to provide a ZIP of the appropriate set-up for you, but cannot provide support for it. Contributions on DocBook toolchains for Windows are welcome!
The “AGSay” program is used by start.pl to interface with the SAPI TTS on Windows. If you need to compile it, you need to have a SAPI 5.x series SDK installed. Licencing restrictions prevent us from including certain parts of this – such as the MSI Merge Modules – so if you want to build an entire release that includes SAPI components you'll unfortunately have to download those too).
On UNIX platforms, eflite (the Emacspeak Flite speech server) is used for speech and standard serial ports and settings may be used for Braille output.