Your service operation isn’t one-size-fits all, so your IT service management solution shouldn’t be either
The Vivantio Platform allows you to focus on the IT service management tools that make sense for your organization’s unique service model: from incident, problem and change requests, to service requests, client knowledge and asset management
A complete OpenSource Network Management System Is SNMP-Standard Oriented (tested on Cisco and Linux). It Integrates Syslog, Tacacs, RRDtool (Performance Graphs), Maps, Traps, TFTP, Autodiscovery, Sound Alerts, AAA, Modular and Extensible.
penemo is a network/server monitoring app. It's design allows simple ping/http checks, SNMP polls, as well as customized checks. When an error is detected, alerts can be sent via. email, or custom scripts can be executed.