Fast C++ logging library
Efficient, deferred formatting for logging on embedded systems
Simple C++ library for easy and flexible logging
Debug Facility for Real-Time issues
Graphical viewer for GNU ddrescue mapfiles
Log routing for Docker container logs
Linux kernel mode debugfs keylogger
Snare Enterprise: bit.ly/Snare-Trial
Decrypts and logs a process's SSL traffic
A spy for USB drives.
FS-IISLogViewer - analyze IIS LogFiles
A Configurable Integrated Monitoring (CIMON) system for Android
Colour lines in syslog-ng logs according to severity