Nhopkg is a lightweight and powerful package manager system for Unix-like operating systems. Nhopkg can install, remove, update, search, and manage software packages in its own .nho format. Nhopkg aims to be a universal package manager. Because of this, Nhopkg isn't only a package manager, but is also a set of guidelines to pack up software for any machine. Therefore, to check package dependencies, Nhopkg searches for specific files instead of package names.
deb-install is a command line tool that can install or show information about packages and files in several different formats. Whenever a program is installed using deb-install, it is converted into a .deb package beforehand, and thus can be removed with a simple "apt-get remove <name>". It currently supports apt-get, .deb, .rpm, .dsc, and .tar/.zip (source archives). Compression via gzip or bzip2 is handled automatically. If a needed tool is missing, deb-install asks whether it should install it.
Simple Perl Package Manager tracks the files added or deleted from a system by using "find". It can detect modified files using installwatch, make backups of modified or deleted files, and remove, list, or make a tarball of a package. It records MD5 checksums of all installed files and includes a script to verify them and check other attributes of a package.
XPKGTOOL is a GUI front-end for pkgtools that allows you to manage, install, remove, and upgrade packages with ease, through a nice and user friendly X-based interface. It comes with a built-in update manager, called SlackGrade, that will help you to keep your Slackware system up to date, checking, downloading, and upgrading the system with the latest packages available from the main Slackware distribution sources on the Web.
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.
BitRock InstallBuilder allows you to create easy-to-use multiplatform installers for Linux (x86/PPC/s390/x86_64/Itanium), Windows, Mac OS X, FreeBSD, OpenBSD, Solaris (x86/Sparc), IRIX, AIX, and HP-UX applications. The generated application installers have a native look-and-feel and no external dependencies, and can be run in GUI, text, and unattended modes. In addition to self-contained installers, the installation tool is also able to generate standalone RPM packages.
toast is a simple package manager for Unix. It automatically locates and downloads source code, determines how to compile it, installs each package in its own directory tree, and makes the resulting binaries available through an encap/GNU stow-like symlink tree. It also supports binary packages. It is often used to install and manage software in a non-root user's home directory.
APT-RPM is a port of Debian's APT tools for RPM based distributions (Conectiva, Red Hat, SuSE, ALT-Linux, etc). APT is an advanced package management utility front-end which allows you to easily perform package installation, upgrading and removal. Dependencies are automatically handled, so if you try to install a package that needs others to be installed, it will download all needed packages and install them.