GCompris is an educational software suite with numerous activities for children aged 2 to 10. Some of the activities are game-orientated, but nonetheless still educational. These include computer discovery (keyboard, mouse, different mouse gestures), algebra (table memory, enumeration, double entry table, mirror image), science (the canal lock, the water cycle, the submarine, electric simulation), geography (place the country on the map), games (chess, memory, connect 4, oware, sudoku), reading practice, and others (learn to tell time, puzzles of famous paintings, vector drawing, cartoon making, etc.). It currently offers in excess of 100 activities, and more are being developed.
Genius is an arbitrary precision integer and multiple precision floating point calculator. It includes its own programming language similar in some aspects to C, bc, or Pascal. It can deal with rational numbers and complex numbers. It has matrix support as well. It uses the gmp library so it is very fast for calculations of large numbers. It has a command line and a GNOME interface. The GNOME interface supports plotting functions and 3D surfaces.
GQuiz is a generic question/answer drilling program. You provide a program that displays the question and answer, given as a single filename on the command line, and gquiz randomizes, prevents immediate repetition, and temporarily eliminates questions you've answered correctly "enough" times in a row. The author uses GQuiz with cgoban to study go, the Asian strategy game, but it could just as well be used to memorize States and their Capitals, or foreign language vocabulary, etc.
GnomeRSVP is a "Rapid Serial Visual Projector" similar to products like AceReader. In this dynamic representation of text, each word is flashed on the screen one at a time in succession. The reader is less inclined to "oralize" the text, rather the reader interprets whole words as meaningful written symbols. Automatic re-reading of adjacent previous text is therefore rendered impossible. This results in much higher reading speeds than are possible with standard techniques.
Ekiga (formely known as GnomeMeeting) is a soft phone, video conferencing, and instant messenger application for use over the Internet. It supports HD sound quality and video up to DVD size and quality. It is interoperable with many other standards compliant software, hardware, and service providers as it uses both of the major telephony standards, SIP and H.323.
ADIOS boot CD is a Linux live CD based on Red Hat Linux and a 2.6 kernel, with additional support for squashfs, unionfs, and SELinux. The CD can run from RAM, USB memory stick, or use FAT/EXT files for /var, or copy/install the CD to FAT/EXT files. The user can choose from KDE or IceWM. The user can start User Mode Linux (UML) virtual machines, each of which can start X. Each of the virtual machines can be networked via virtual ethernet switches and hubs. ADIOS requires at least 128MB RAM to run X11.