MyWANIP 

MyWanIp is a Windows 95,98, ME, NT4, 2000 and XP utility that allows you to discover your WAN IP address. Many home and small business users have broadband routers like the Linksys, D-Link, SMC, Netgear, Cisco, Agere between their LAN and Internet.
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QK SMTP Server 

QK SMTP Server is a powerful but easy-to-use smtp server software, which can send mails from localhost to the recipients' mailboxes directly at an amazingly high speed. Arrived or not, you will get a feedback instantly.
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EzDNS 

EzDNS publishes and/or emails your PC's dynamic IP address (both local and outside address) and connection information to a remote web page or text file that is customizable. EzDNS is deal for people with cable or DSL internet.
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