Gnome-o-phone is an internet telephone. In other words, if you and your friend have computers with sound cards and network connections, you can use gphone to talk to each other and save on phone bills. Gphone uses GSM compression, so the data rate should be low enough to work over a reasonable modem connection. Gphone supports full duplex if your sound card does.
gnome-pkgtool is a GTK+/GNOME front-end to Slackware package management tools (pkgtool). You can install/uninstall/upgrade .tgz packages, build packages from source and install them, and inspect package content. It relies on the installpkg(8) and removepkg(8) tools for installing and uninstalling packages, and on checkinstall for building packages from source.
gnome-yum is a graphical program which makes it easier to use and setup the YUM install program. It displays the packages available on the package service sites with filtering. The settings for package services may be managed. The cache used by YUM can be managed to free up disk space, manually install, and transfer downloaded packages. Detailed information is displayed regarding the installed packages or package files. The files in the packages can be displayed with a program chosen by the user.