Graylog - Graylog is an open source log management platform for collecting, indexing, and analyzing both structured and unstructured data.
Splunk - Splunk's operational intelligence platform helps unearth intelligent insights from machine data.
rsyslog - Rsyslog is an enhanced syslogd supporting, among others, MySQL, PostgreSQL, failover log...
syslog-ng OSE - The syslog-ng Open Source Edition™ is a highly portable log management solution to create collect...
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Syslog Watcher - Syslog Watcher is a syslog solution for Windows.