rsyslog is described as 'Rsyslog is an enhanced syslogd supporting, among others, MySQL, PostgreSQL, failover log destinations, syslog/tcp, fine grain output format control, high precision timestamps, queued operations and the ability to filter on any message part'. There are more than 10 alternatives to rsyslog for a variety of platforms, including Windows, Linux, Mac, Online / Web-based and Android. The best alternative is syslog-ng OSE, which is free. Other great apps like rsyslog are nxlog (Free, Open Source), Syslog for windows (Free, Open Source), Kiwi Syslog Server (Paid) and Mac Syslog Center (Paid).
Mac-OSX Syslog Center is syslog server monitor and analyzer software for syslog events and notifications that supports any vendor and helps to monitor, analyze, report and correlate real-time network events.
Nagios Log Server is a powerful enterprise-class log monitoring and management application that allows organizations to quickly and easily view, sort, and configure logs from any source on any given network.
The Snare Server, from InterSect Alliance, is a proprietary Log Monitoring solution that builds on the open source Snare agents to provide a central audit event collection, analysis, reporting and archival system.
BLËSK is a suite of applications for network monitoring and management. All of the applications within BLËSK are finely tuned for the purpose having all your network monitoring applications running smoothly on a single machine.