glogg - glogg is a multi-platform GUI application to browse and search through long or complex log files.
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.
BareTail - BareTail is a real-time log file monitoring tool. Features Real-time file viewing
AppDynamics - Get real-time insight from your apps using Application Performance Management—how they’re being used, how they’re performing, where they need help.
SPHW - LogViewer - A free platform-independent tool for monitoring log files in real-time.
Zabbix - Track, record, alert and visualize performance and availability of IT resources