nxlog - NXLog offers log management solutions for companies of all sizes.

AWS CloudTrail - AWS CloudTrail is a web service that records AWS API calls for your account and delivers log files to you.

Splunk - Splunk's operational intelligence platform helps unearth intelligent insights from machine data.

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

Graylog - Graylog is an open source log management platform for collecting, indexing, and analyzing both structured and unstructured data.

Serilog - Backend Development and Utilities