The AbiWord word processor is a full-featured cross-platform word processor.
IOLib is a universal multiplatform IO library available in C, C++ and Objective C. It provides separate classes for input and output. It supports file IO, memory buffers and BSD sockets. Different binary formats (Intel, Raw, PDP) are supported.
This project is an attempt to create a wrapper between filesystem code for one operating system and compile it for another. For example, a Linux filesystem driver could work natively in Windows if the project goes as planned.