Here is a list of station automation software (and the stations that use the software) that was collected by Jeff Shaw. Jeff is creating a guide to automation for the Prometheus Web site.
KVLP-LP (dvd)
WBCR-LP (megaseg)
KRFP-LP (winamp +)
WRYR-LP in South Arundel (iTunes +)
WSLR-LP (megaseg)
KREV-LP (mac)
KDRT-LP (rivendell)
others:
SAMbroadcaster
campware.org (campcaster)
ZaraRadio
stationplaylist.com
raduga
DirEttore
BSI Simian
http://www.bsiusa.com/software/simian/simian.php
Not free, but looks pretty good. Well recomended, and not nearly as expensive as some other commercial systems. And it is all integrated into one system. Not a user yet, we don't have our station up yet, but this is what we're leaning toward.
Zara Radio is cool but is driving me crazy.
I really like the usability of Zara Radio. Plays your music from your file system, no making another copy of all your music and importing it into another database/central storage, easy to set up station IDs, nice graphical interface.
But It is driving me crazy that Zararadio will not recognise the microphone. I am running in a single sound card situation so that might be part of the problem. BUT IT WON'T WORK - for me.