MN Viewer (Mobile Network Viewer) is a lightweight framework designed for system administrators who would like to be able to monitor many aspects of their network from their mobile phone. It allows for very simple expansion using simple PHP plugins. It is designed to integrate with other monitoring tools such as Cacti.
Meshtool is a mesh network toolkit designed to assist in mesh monitoring, administration, and research. It is Eclipse-based and leverages many Eclipse frameworks such as EMF, GEF, and Teneo. OpenStreetMap is used for 2D map data while 3D geographic data support is in early development stages through the Nasa World Wind. Meshtool is still in an alpha stage, but is being actively developed.
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.