glogg - glogg is a multi-platform GUI application to browse and search through long or complex log files.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
BareTail - BareTail is a real-time log file monitoring tool. Features Real-time file viewing
Datadog - See metrics from all of your apps, tools & services in one place with Datadog's cloud monitoring as a service solution. Try it for free.
klogg - klogg is the fork of glogg - the fast, smart log explorer.
Prometheus - An open-source systems monitoring and alerting toolkit.