Snort 1.7 for Windows - This is a working port of Snort to Windows NT/2000/9x.
Changes: Complete rewrite of snort port, -s to send alerts/logs to a remote syslog server; -E for eventlog; -W to list available interfaces, and some logging bugfixes. Also, this release is not 1.7 exactly, but is a CVS from 2 days ago. This means it includes the Spade fixes and any other bug fixes that were in the CVS version. Source available here.