fam++ is a C++ wrapper for fam, which uses imon or DNotify (Linux 2.4.x) to inform it when inodes change (the net effect being that applications can register interest in a file, and have events send to the application when the file changes). Fam++ also integrates with gdk and Loki to make creation of C++ GTK+/GNOME apps simpler.
GNOME is the GNU Network Object Model Environment. This project is building a complete, user-friendly desktop based entirely on free software. This desktop consists of small utilities and larger applications that share a consistent look and feel. It uses the GTK as the GUI toolkit for all GNOME-compliant applications.
Gnome-GCJ is a set of GTK+ and GNOME bindings for Java. It compiles with the GCJ compiler (part of egcs) and uses the GCJ runtime library libgcj. GCJ is capable of compiling Java source code to native machine code, which makes Java code almost as fast as C++ code. As the interface between Java and GTK+, CNI (Cygnus Native Interface) and C++ will be used instead of the more traditional JNI and C. This means that support for other Java runtimes has been sacrificed in favour of GCJ and its faster CNI.
GTK, which stands for the Gimp ToolKit, is a library for creating graphical user interfaces. It is designed to be small and efficient, but still flexible enough to allow the programmer freedom in the interfaces created. GTK provides some unique features over standard widget libraries.