More updated package systems that are are independent of ubuntu versions

[Peng Yu]

Hi,

macports on mac seem to be fairly updated, and the latest version
available does not depend on which version of the OS is. But many
packages on ubuntu are outdated. Even the lastest release of ubuntu
may not have the most updated packages, and many updated packages
available in a later version ubuntu is not available to an older
version ubuntu. I'm wondering if there is something similar to
macports on ubuntu that can give me consistent updated packages across
different version of ubuntu OS. Thanks!

-- 
Regards,
Peng