GtkGEP turns your computer into a realtime effects processor. You can plug your guitar into the computer and play with cool distortion effects, for example. It has a modular plugin structure, with standard plugins including distortion, overdrive, delay, reverb, equalizers, and a flanger. It works in 16-bit resolution, in mono mode, and with frequencies from 11khz to 44khz. The sound quality is very good.
GtkMathView is a GTK widget for rendering MathML documents. It is meant to be a standalone, light-weight component and not a full browser. GTK applications can use the widget as a window for displaying mathematical formulas and doing simple interactions. Among other features, GtkMathView includes support for breaking long mathematical expressions, rendering of stretchy operators, and provides a customizable support for additional fonts.
GTKtalog is an archiver to store a CD file tree structure. It can be used to easily browse a CD-ROM database. Each disk, folder and file has a size, date, category, description, and content parameter and can be completely edited or deleted. The file search module can do searches on filename, foldername with name, category description, date, filesize, and content parameter. Each filetype has its own icon. It possible to use programs like tar, arj, zip, or scripts to extract information from files to include in the database. Gtktalog can mount, scan, umount, and eject a CD-ROM in the background.