LibreNMS is an autodiscovering PHP/MySQL-based network monitoring system forked from Observium. It aims to be easy to use and painless to deploy, and to support monitoring of a wide range of devices. Observium's license changed to a modified QPL license in May 2012, then was split into free and commercial versions. The aim of LibreNMS is to continue to create a usable NMS, but with a community focus and GPL licensing.
ida-syslog is a Web-based viewer for syslog data. It requires syslog data in a MySQL database. It uses AJAX and is based on jQuery and PHP. It is intended for use with rsyslog-mysql, but can be adapted to any table format via the config file. It has a fast UI with no page reloads, and can save search settings as templates for easy reuse. Tail mode and auto-loading of older entries when scrolling down. Fixes for use with Windows-Syslog-Tools (NTSyslog2, Snare).