NetWorx is a simple and free, yet powerful tool that helps you objectively evaluate your bandwidth situation. You can use it to collect bandwidth usage data and measure the speed of your Internet or any other network connection. NetWorx can help you identify possible sources of network problems, ensure that you do not exceed the bandwidth limits specified by your ISP, or track down suspicious network activity characteristic of Trojan horses and hacker attacks.

The program allows you to monitor all your network connections or a specific network connection (such as Ethernet or PPP) only. The software also features a system of highly customizable visual and sound alerts. You can set it up to alert you when the network connection is down or when some suspicious activity, such as unusually heavy data flow, occurs. It can also automatically disconnect all dialup connections and shut down the system.

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SoftPerfect Network Scanner is a free multi-threaded IP, NetBIOS and SNMP scanner with a modern interface and several advanced features. It is intended for both system administrators and general users who are interested in computer security. The program pings computers, scans for listening TCP ports and displays which types of resources are shared on the network (including system and hidden).

In addition, it allows you to mount shared folders as network drives, browse them using Windows Explorer, filter the results list and more. SoftPerfect Network Scanner can also check for a user-defined port and report back if one is open. It can also resolve host names and auto-detect your local and external IP range. It supports remote shutdown and Wake-On-LAN.

Key features

* Pings computers.
* Does not require administrative privileges.
* Detects hardware (MAC) addresses even across routers.
* Detects hidden shared folders (normally invisible on the network) and write accessible shares.
* Detects your internal and external IP addresses.
* Scans for listening TCP ports and SNMP services.
* Retrieves currently logged-on users.
* You can mount and explore network resources.
* Can launch external third party applications.
* Exports results to HTML, XML, CSV and TXT
* Supports Wake-On-LAN and remote shutdown.
* It is absolutely free, requires no installation, and does not contain any adware/spyware/malware.

NetMeter is small and also powerfull program for network bandwidth monitoring .
Realtime bandwith monitoring was never easier.

Requirements:

· Windows 2000 or newer is required for “transparency” and “balloon hint” features
· If you are using Windows 95 you will have to install an update from Microsoft that contains the IP-Helper API (IPHLPAPI.DLL).

What’s New in This Release: [ read full changelog ]

· NICs are now being identified by Name and MAC address
· Fixed problem with multiple monitors when window position is negative
· Some other small bug fixes

PRTG Traffic Grapher is a free software for network monitoring  and also classifying bandwidth usage. This program  completely free for personal and commercial use and may be downloaded for free. PRTG Traffic Grapher is designed to run on a Windows machine in your network for 24 hours every day, and constantly records the network usage parameters.

features of “PRTG Paessler Router Traffic Grapher”:

· Reliable network monitoring used by more than 100.000 users every day
· Supports data acquisition via SNMP, packet sniffing or Netflow protocol
· Classifies network traffic by IP address, protocol and other parameters
· Works with most switches, routers, firewalls, and other network devices
· Easy installation with a few clicks on Windows 2000/XP/2003
· Monitoring engine is capable of monitoring up to several thousand sensors
· A Freeware Edition is available for smaller networks and SOHOs

Tunnelier is SSH client for windows beside the famous putty, this program come with SFTP, tunneling, terminal, FTP-to-SFTP bridge features.

it fast and also easy to use SSH client that offers flexible TCP/IP tunneling support. Tunnelier incorporates an FTP-to-SFTP bridge which performs translation between the FTP and SFTP protocols, allowing any FTP client application to connect securely to an SFTP server through Tunnelier.

features:

* one of the most advanced graphical SFTP clients;
* state-of-the-art terminal emulation with support for the bvterm, xterm, and vt100 protocols;
* support for corporation-wide single sign-on using SSPI (GSSAPI) Kerberos 5 and NTLM user authentication, as well as Kerberos 5 host authentication;
* support for RSA and DSA public key authentication with comprehensive user keypair management;
* powerful SSH port forwarding capabilities, including dynamic forwarding through integrated SOCKS and HTTP CONNECT proxy;
* powerful command-line parameters which make Tunnelier highly customizable and suitable for use in specific situations and controlled environments;
* an advanced, scriptable command-line SFTP client (sftpc);
* a scriptable command-line remote execution client (sexec) and a command-line terminal emulation client (stermc);
* an FTP-to-SFTP bridge allowing you to connect to an SFTP server using legacy FTP applications;
* WinSSHD remote administration features;
* single-click Remote Desktop forwarding.