NXLOG
NTsyslog This program runs as a service under Windows NT based operating systems. It formats all System, Security, and Application events into a single line and sends them to a syslog(3) host.
Snare Event Log Agent commercial and open source version.
Syslog Server a simple yet powerful Syslog protocol Server & Analyzer. Can be tuned to only log events under a threshold, or to directly mail and admin when another threshold value is reached. The events can be viewed by hosts, by severity, or by facility.
syslog-win32 is another syslog for windows, it includes daemon and client.