Fluentd - Fluentd is a cross platform open source data collection solution originally developed at Treasure Data.
glogg - glogg is a multi-platform GUI application to browse and search through long or complex log files.
logstash - logstash is a tool for managing events and logs.
BareTail - BareTail is a real-time log file monitoring tool. Features Real-time file viewing
Fortinet FortiAnalyzer - Fortinet FortiAnalyzer is a powerful product for Security Fabric Analytics and Automation.
klogg - klogg is the fork of glogg - the fast, smart log explorer.