The SDM is an operating system agnostic, Java-focused (but not limited to), package manager. It helps developers and configuration management personnel to automate the jobs related to install software packages. It allows you to perform the same procedures no matter what OS you are running. Among other things, it allows you to easily create package repositories for (both stable and production) that can be distributed to development and configuration management teams. This project is still in its infancy and under a lot of development. If this software is useful for you, please me know.
To learn how to use SSPS to automate the steps of software deployment, please read the Get Started. Additionally, you may want to join the #ssps channel on Freenode (irc.freenode.net).
In a world full of package managers (RPM, APT, Portage, Homebrew, etc) why write another package manager tool? Because: