ZABBIX is an enterprise-class distributed monitoring solution designed to monitor and track performance and availability of network servers, devices, and other IT resources. It supports distributed and Web-based monitoring, auto-discovery, real-time monitoring, SLA assurance, trending, and more.
IPplan is a Web-based, multilingual IP address management and tracking tool which simplifies the administration of your IP address space. It can handle a single network or multiple networks with overlapping address spaces. It features DNS administration, internationalization, importing of network definitions from routing tables, importing of definitions from TAB-delimited files and NMAP's XML format, support for multiple administrators with different access profiles (per group, per customer, per network, etc.), definitions of address space authority boundaries per group, finding free address space across a range, display of overlapping address spaces between networks, search capabilities, an audit log, statistics, circuit tracking, and tracking and sending SWIP/registrar information.