Milestone is currently offering a free 1-cam software license. I registered w/ them, recvd the license w/in 1 day. Very powerful software w/ server. You can search the database for movement in a specified are, like Skyline. It allows ditching the bundled software that comes w/ D-link, Vivotek, etc.
I needed to find a package that offered auto-recording and to run as a Windows Vista Service. I now have C17, C5, 747 aircraft getting recording when they enter FOV.
http://www.milestonesys.com/downloads/free_xprotect_license