Logmatic - Logmatic is a log centralization, analytics & visualization platform to improve software & business performance.
ServerSuit - ServerSuit is a browser based program that enables remote Linux administration, monitoring, website hosting, and server setup automation.
Serilog - Backend Development and Utilities
RedGate SQL Monitor - SQL Monitor helps you and your team find issues – before they become problems
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
Nagios - Complete monitoring and alerting for servers, switches, applications, and services