Software developers for EasyFlash should start with this document:
The EasyFlash Programmer’s Guide is a must-read. This manual gives you all information to start to develop software for the EasyFlash cartridge in a low-level way. This is what most developers do.
The second document, EasyFlash Application Support gives additional information about special topics, for example about EasyFS, an file system which is used by some EasyFlash software. Be aware that many of these topics are examples only, there is no well-documented reference implementation available for them. Use that document for your inspiration only or in case you want to know how others did it.
Source Code Repository
All software source code and hardware design files are hosted in a public repository on bitbucket: