Log Harvestor - Simple, modern & fast log management platform
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.
Bulletlog - Aggregate logs, discover and fix errors in real time
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.
LogTailApp - LogTail is a local and remote (SSH) log file viewer and monitoring application for Mac OS X. It is a pure, modern, document-based Cocoa App
Zabbix - Track, record, alert and visualize performance and availability of IT resources