FileType is a file type detection engine written in C. It will appeal to coders looking for functionality similar to that provided by the 'file' command. FileType is compact (less than 20K binary), efficient, and very portable. FileType is part of the family of software created from the commercial Xamime email filtering project.
stdnoj is a cross-platform C++ class library that includes classes for using portable strings, databases, SMTP, POP, NNTP, arrays, files, directories, logging, email, and sockets. While templates are used, no reliance upon STL or other (traditionally error-prone) technologies has been used, which increases portability between compilers.
MillScript-VFS is a URI-based virtual filing system for Java. It allows protocol independent access to files and folders with complete platform independence. The intention is to support any protocol and archive supported in Java, with features such as memory and disk-based caching of file content and folder listings. The API can also support artificial filing systems, such as an XML document viewed as a filing system.