Hi, i am IT & Networking engineer, i have been working about monitoring for long time using open source softwares, if you have a linux Server (Ubuntu for example) i can offer you a solution to monitor all your infrastructure devices( Routers, switches ) that support SNMP protocol, all your end devices (Servers, pc, ....), Applications (SQL....) and Telephony solutions. the solution generate graphical rapports as well as statistics, it can send SMS, Email or other alerts to the administrator when there is a problem. i wll provide too a dashboard which should be able to depict the overall health status of all networks being handled in a brief snippet. i am sure you will be satisfied with my work