logstash - logstash is a tool for managing events and logs.
Growl for Windows - Growl for Windows is a Windows-compatible version of https://alternativeto.
rsyslog - Rsyslog is an enhanced syslogd supporting, among others, MySQL, PostgreSQL, failover log...
Logwatch - Logwatch is a customizable log analysis system.
Graylog - Graylog is an open source log management platform for collecting, indexing, and analyzing both structured and unstructured data.
Notifu - Notifu, a free open source pop-up balloon utility