DanielLeidert: ... or, more generally, all tools used to maintain a local apt-get-able repository of packages.

Mailing list discussions, my own archives (I have a manual about one of these tools) and Robert C. Sanchez often linked Howto are IMO indicators, these tools are widely adopted. The existence of apt-get.org (which does not contain the archives of all the Debian derivatives, nor all the local repositories) is probably a proof for this observation and shows, how essential these tools are/became for the whole community.