Centralize, transform and stash your data
Advanced and structured logging for various .NET platforms
Simple .NET logging with fully-structured events
An interface that describes a logger
Logging utility for DB2 for LUW written in SQL-PL
Free Syslog Server for Windows with a graphical user interface
Monitors directories for changes, executing a user-defined application
Is your host up or down?
A tiny and easy to use log system for C/C++
Command line client interface for LOGalyze 4
log4j support for native nagios (nsca) integration