This is the GNU Modula-2 standard library that comes with the gm2 compiler.

ps is an extension similar to the pdf extension but for creating PostScript files. Its api is modelled after the pdf extension. It has some advanced features like taking kerning into account and support for hyphenation. PostScript files can converted to pdf files with ghostscript retaining hyperlinks and bookmarks.

OAuth is an authorization protocol built on top of HTTP which allows applications to securely access data without having to store usernames and passwords.

This extension provide API for communicating with MessagePack serialization.

Log4c is a library of C for flexible logging to files, syslog and other destinations.

Qt is a cross-platform C++ application framework. Qt's primary feature is its rich set of widgets that provide standard GUI functionality.