Cobbler is a network installation and update server. It can be used to automatically set up PXE, install virtual guests, manage answer files, and reinstall existing Linux machines. Advanced features include importing distributions from DVDs and rsync mirrors, kickstart templating, integrated yum mirroring (integrated with the installer to make updates available at install time), creation of netboot ISOs, and built-in DHCP/DNS Management. Tools such as "cobbler triggers", a Python API, and an XMLRPC API allow integration with cobbler with the rest of your datacenter environment or other systems management applications. There is also a Web interface to simplify management of the install server. Cobbler supports RHEL 4+, Fedora, and derivative distributions, and is also able to install other popular distributions.
DeltaRPM is a tool that generates RPMs that contains the difference between an old and a new version of an RPM. This makes it possible to recreate the new RPM from the deltarpm and the old one. You don't have to have a copy of the old RPM, as it can also work with installed RPMs. The package also contains tools for creating and applying delta ISOs.
SoftwareUpdate is a Java class that assists with adding an automatic software-update feature to applications. It doesn't perform the update, but takes care of administrative stuff like looking up the version number of the latest version, with the ability to distinguish and check different places based on operating system. It also builds the OS-specific URLs to make it easy to do a quick latest-version check in any desktop or server application.
NUU (Network Update Utility) is a GUI RPM package manager based on Yum that supports downloading, installation, and updating of packages from remote repositories, and removal of installed packages. It has the ability to examine both installed and available packages, and includes a repository configuration editor. It also supports package groups and suites of packages. Finally, it recognizes a simple authentication mechanism called buffet based on a server-side cgi-bin program.
Paludis is a package manager for Gentoo (and derived distributions) and Exherbo. It consists of a core library and a number of console-based clients. Package formats supported include Gentoo ebuilds and kdebuilds (as defined by the Package Manager Specification), the Exherbo exheres-0 format, and various miscellaneous utility pseudo-formats for managing accounts, unwritten and unavailable packages, and packages for which no package exists.
cerbeRun is a software runner. The applications are stored inside a .tar (version 0.3 will use the ISO9660 format) file renamed with the extension .run. cerbeRun's format allows you to switch between different architectures using an .xml file, in which are specified different rules for different archictures. This is all done in user space without root access.