CertExams.com JNet Simulator. 

CertExams.com router simulator has the following features: -Several lab exercises for candidates preparing for JNCIA -Cisco router console simulation with several supported commands. -Comprehensive help file -Flash cards
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CertExams.com CCNA Network Simulator. 

CertExams.com router simulator has the following features: -Several lab exercises for candidates preparing for CCNA -Cisco router console simulation with 80+ supported commands. -Network Designer -Comprehensive help file -Flash cards
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IP Mailer 

If your ISP gives your PC or router a temorary/dynamic IP address that keeps changing from time to time, this application will monitor and notice it, and automatically send emails to any amount of recipients.
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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.
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Router IP Console 

Router IP Console is a simple in usage SNMP-based tool intended for management and control of active network equipment (such as IP routers, repeaters etc). "Router IP Console" can raise an alarms via email on critical situations. And more...
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Autoroute SMTP 

Autoroute SMTP is designed for automatic switching between SMTP servers depending on what network you are currently working in.
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