Directory Watch 

A Server Side application to monitor queues. Perform actions based on a number of files in a directory. Restart services, run programs, send email notifications, reboot. Automate the monitoring and recovery of your application/print/file server.
mailsweeper mimesweeper smtp directory file queue scan email alert notify log run execute

BatteryMon 

Monitor the performance of laptop computer batteries and uninterruptible power supplies (UPS). Graphically see the charge / discharge rate, diagnose problem battery cells and compare your batteries performance with expected discharge rates.
laptop battery ups charge computer power utility voltage portable notepad test acpi

MAPInotify: Shadow of Power! 

MAPInotify: Shadow of Power! is an advanced skinable mail-checker utility that can monitor unlimited number of mailboxes, IMAP4 folders or any Microsoft Exchange folders and notify you in any number and combination of ways.
outlook exchange checker mapi cdo pop3 imap4 http hotmail advanced

Engineers Edition 

An awesome collection of over 38 Networking Tools. From graphing Bandwidth Monitors to Network Discovery tools to Cisco Router tools to a Network Monitor with email alerts, to a Full MIB Browser. As you can see from its size, this toolset is LOADED.
ping snmp icmp network discovery bandwidth solarwinds tools router mib traceroute ip address networking

Advanced Host Monitor 

HostMonitor is a system management tool that continuously monitors servers availability and performance. It has 55 test methods, 25 alert methods, highly flexible report and log manager. Package includes Log Analyzer, Web Service and other utilities.
network monitor lan monitor host monitor ip monitor snmp monitor web monitor cpu monitor sql monitor advanced monitor tcp monitor

BWMeter 

BWMeter is a powerful bandwidth meter, monitor and traffic controller, which measures, displays and controls all traffic to/from your computer or on your network.
download upload meter internet bandwidth statistics traffic speed limit