[cdvonstinkpot]

Ubuntu LTS variants allow the creation of 'PPA' repos of your own, so you can use apt-get for your own software.

You upload a source file & it makes a package out of it for you.

https://help.launchpad.net/Packaging/PPA

[shuzchen]

You can pretty much make a package for any distro on the planet to be installed using the default package manager. This isn't unique to Ubuntu LTS.