10-Strike Network Monitor is a network device status monitor which allows you to obtain online data on the time a device becomes available and the time it goes out, and thus ensure a prompt response to various events. Monitor databases, SNMP, TCP...

IPCheck Mobile GUI offers reliable network and website monitoring through your PocketPC. Sensor types include PING, PORT, HTTP, HTTPS, Advanced HTTP, HTTP Transaction, DNS, SMTP, POP3, SNMP and custom.

Configure NetFlow v5 via SNMP on supported Cisco® devices. Facilitate collectors for Cisco NetFlow data, specifying the ports on which the collectors are listening, and monitoring inbound/outbound (ingress/egress) traffic data per interface.

AdRem iTools is a networking toolset combining Ping, Traceroute, DNS Lookup, SNMP viewer, port/network/bandwidth scanner, and more. The tools’ output can be saved to a file (text, XML, HMTL, or Excel), while Ping or Traceroute tests can be graphed.

Manage network devices (hubs, switches, routers, access servers, cross-connectors, physical line/DSL modems, Windows/Unix stations and any other SNMP-enabled devices in the corporate network) remotely from your PC

Didyma is a network documentation and monitoring tool. It contains a graphical interface to design and document your computer networks. The monitoring function is based upon ICMP (ping), TCP ports, SNMP objects, URL and SMTP testing.

FireScope Workbench is a collection of free tools designed to make life easier for IT operators. Features a Service Modeler with dependency discovery, extremely fast Ping Sweep utility and MIB browser/walker combined. More free tools coming soon.

InterMapper monitors everything on your network and alerts you when problems arise--before your customers notice. It uses pings and SNMP to check routers, switches and other network infrastructure and uses synthetic transactions to test your servers.