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Angry IP Scanner 2.21: Scan IP addresses in any range as well as any their ports (Windows Freeware).
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Complete Internet Repair 0.9.5.955: All in one tool to repair common internet connection issues, it attempts to repair everything internet related on a Windows system (Windows Freeware).
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CurrPorts 1.87: Displays the list of all currently opened TCP and UDP ports on your computer (Windows Freeware).
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Network Password Recovery 1.31: Recover Windows XP/Vista network passwords / Credentials file (Windows Freeware).
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PuTTY 0.60 r3: PuTTY Tray is a free and open source terminal emulator application which can act as a client for the SSH and Telnet (Windows Freeware).
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SmartSniff 1.76: Network monitoring utility that allows you to capture TCP/IP packets that pass through your network adapter (Windows Freeware).
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TCPView 3.04: Lists TCP and UDP endpoints, including the Local/Remote addresses of TCP connections (Windows Freeware).
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TFtpd32 3.51: Tftpd32 is for Trivial File Transfer Protocol (TFTP) client, including DHCP, TFTP, SNTP and Syslog servers, can also be used for PXE boot (Windows Freeware).
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WinSCP 4.3.2: A free and open source SFTP/FTP client to secure file transfer between a local and a remote computer (Windows Freeware).
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XP TCP/IP Repair 1.0: Repair your Windows XP Winsock and TCP/IP registry errors (Windows Freeware).