Serilog - Backend Development and Utilities
Fluentd - Fluentd is a cross platform open source data collection solution originally developed at Treasure Data.
Logmatic - Logmatic is a log centralization, analytics & visualization platform to improve software & business performance.
logstash - logstash is a tool for managing events and logs.
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
Fortinet FortiAnalyzer - Fortinet FortiAnalyzer is a powerful product for Security Fabric Analytics and Automation.