Fluentd: Unified Logging Layer (project under CNCF)
A nginx log explorer
A powerful terminal app for structured log streaming
C++ library for easy and flexible logging
Apache Log Parser and Data Normalization Application
A replica of the logrotate utility, except this also runs on Windows
A fake log generator for common log formats
Easy, flexible, lightweight, platform independent C++logging library
LogDNA Agent streams from log files to your LogDNA account
Open Source SIEM