Nmap ("Network Mapper") is a free and open source (license) utility for network exploration or security auditing. Many systems and network administrators also find it useful for tasks such as network inventory, managing service upgrade schedules, and monitoring host or...
Zenmap is the official cross-platform GUI for the Nmap Security Scanner. It is free and runs on Linux, Windows, Mac OS X, etc. Zenmap aims to make Nmap easy for beginners to use while providing advanced features for experienced Nmap users.
RANCID - Really Awesome New Cisco confIg Differ. A web-based tool for automatically downloading Cisco configurations into a CVS version-control system which can be searched, displayed and "diffed" to compare versions of the configuration files.
Automatic physical network topology discovery based on SNMP. Network traffic monitoring. Monitoring invalid and dropped packets (ifInErrors, ifInDiscards). Display VLAN IDs. Computer inventory. Web browser-based access. E-mail alerts notifying.
A fast and lightweight TR-069 Auto Configuration Server (ACS). GenieACS can work with any device that supports the TR-069 protocol. It auto-discovers the device’s parameter tree (including vendor-specific parameters) making no assumptions about the device’s data model.This app doesn't have any features at the moment.
Netdisco is an Open Source web-based network management tool first released publically in 2003. The target users are large corporate and university networks administrators. Data is collected into a Postgres database using SNMP and presented with a clean web interface using Mason.
NetDisco vs NeDI opinions
Seems valid and viable but not tried.
Diagnose network performance problems in real-time with Intermapper, network monitoring software from HelpSystems. Powerful, reliable, and user-friendly, Intermapper helps network professionals stay ahead of outages by monitoring the performance of all your physical and virtual...
Network management and monitoring software for managed devices from any vendor that helps to discover, monitor, mapping and analyzing networks topology, connectivity and performance.
rConfig is a free open source network device configuration management utility for network engineers to take frequent configuration snapshots of their network devices.