GAG is a Graphical Boot Manager with a lot of features. It doesn't need a partition, it works with primary and extended partitions in every hard disk, it has a lot of icons, it allows you to put passwords for each operating system, it can swap hard disks and it can be tested from diskette. The SafeBoot feature allows you to boot your hard disk even if GAG is overwritten. It includes extensive support for many languages and keyboard types.
game control program helps you administrate gameservers (it's written for Q1 and Q3, but works for others). It is highly modular and therefore extensible. With the current modules, it can start/stop servers, create and rotate logfiles, allow remote administration via telnet, and kick misbehaving players automagically (according to a rule set).
gfortune is a replacement for the traditional Berkeley fortune program included with the BSD games package. This implementation supports recursion down a tree of fortune files, the option to limit the number of lines output (for scripting), and other features. It fully maintains the functionality of the original. It includes the author's own archive of fortune files.
GiftWeb is an online gift registry system. Items are entered into a wish list, and other users viewing the wish list can mark them as purchased. Web sites can easily be linked to if the item can be purchased online. Users can be members of multiple groups, and can only see the wish lists of other users that are members of the same groups.
GNU GRUB is a Multiboot loader. It was derived from GRUB. It is an attempt to produce a bootloader for IBM PC-compatible machines that has both the capability to be friendly to beginning or otherwise non-technically interested users and the flexibility to help experts in diverse environments. It is compatible with FreeBSD, NetBSD, OpenBSD and Linux. It supports Windows 9x/NT/2000/XP and OS/2 via chain-loaders. It has a menu interface and a command-line interface.