Magazine publishers are highly benefited using OpenX as their backend for their advertising needs. OpenX is an opensource tool which can be installed on any hosting servers. As a first step, it can be even hosted on a shared hosting and installation is just few clicks and you have a backend ready for all adserving needs.
Magazine publishers have complete freedom to sell ads for ad placement, and can track clicks, impressions and peformance of ads.
OpenXservices.com provides complete and custom solution for magazine publishers.