gstar provides a GTK frontend for "starchart", a program written in 1987 by Alan Paeth. The frontend offers a list of pre-defined areas of the sky to chart, plus controls to customize the chart in several ways. Buttons pop up a given postscript chart in gv, or save it to file. Since Paeth's program is freely distributable the source for starchart (along with data files) has been rolled into the gstar package, making it self-contained.
Gstring is yet another guitar tuning application. It requires a soundcard, a microphone, the FFTW package, and if you want a GUI, the Gtk+ toolkit and a new Gtk+ widget called GtkDatabox. A non- Gui version called "string" is included in version 1.0.0 and dynamically linked binaries (for i386 machines) are included as well.
gsyn is internally designed to be an extensible, modular synthesizer, but the interface and current codebase present a Roland TB-303 emulator which is programmed using fasttracker-style note entry. It also features delay reverb and distortion, so the sound is comparable to Propellerhead's ReBirth RB-338. gsyn has been compiled and tested under Linux 2., IRIX 6.2, Solaris 2.6, Windows 95, and Windows NT.
GTC is a game programming library for Linux. Rendering is done via a generic client. Multiple clients may connect to a game server, which will automatically keep the 3D scene graph of all clients in sync with the copy on the server. A demonstration space shooter is included. The shooter is written in Python and has less than 200 lines of code.
Gte is a Texture editor for the POVray raytracer. You can create a texture's declaration in POVray's language by means of normal text or via Tk Widgets adapted for this special usage. You can also make a test rendering with selected lights, and store and retrieve previous declaration statements.