Alchemy Ping 1.0 A nice FREE graphic replacement for the standard PING utility.

IPCheck Server Monitor 5.4.1.863 Reliable network and website monitoring. Sensor types include PING, PORT, HTTP, HTTPS, HTTP Advanced, HTTP Transaction, DNS, SMTP, POP3, FTP, SNMP, as well as various native Windows system sensors and native SQL sensors for MS SQL, MySQL and Oracle.

Kiwi Syslog Daemon 8.2 A freeware Windows Syslog Daemon that receives, logs, displays and forwards Syslog messages and SNMP traps from routers, firewalls, Unix hosts. Includes PIX firewall TCP support and many customizable features.

SoftPerfect Network Scanner 3.9.181 A free multithreaded IP, SNMP and NetBIOS scanner. Both system administrators and general users can use this software. It pings computers, scans for listening TCP ports and displays shared network resources (including system and hidden).

SNMPTest 1.04 SNMP Test for routers is a tool which can query and monitor any SNMP-compatible device but it is especially designed to test SNMP router compatibility.

Bello Network Monitoring WinGUI 5.3.3.642 bello network monitoring offers reliable network and website monitoring, web or windows user interface. Sensor types include PING, PORT, HTTP, HTTPS, Advanced HTTP (e.g. for content checks), HTTP Transaction, DNS, SMTP, POP3, SNMP, FTP and more.

IPCheck Mobile GUI 2.0.2407 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.

Paessler SNMP Tester 2.2 Test and debug SNMP requests with Paessler SNMP Tester for free. Run simple SNMP requests against a device in your network, testing each single step of the SNMP request as it is logged into a logfile for analysis.

Paessler Netflow Tester 1.1 Paessler Netflow Tester is a free program that simply dumps the data of all Netflow packets that a computer receives from a Cisco router. This can be useful when debugging bandwidth monitoring configurations based on Cisco's Netflow protocol.