Monitor network connections

• Program name: AdapterWatch
• Web site: http://www.nirsoft.net
• Description: AdapterWatch displays useful information about your network adapters: IPddresses, Hardware address, WINS servers, DNS servers, MTU value, Numberf bytes received or sent, The current transfer speed, and more. In
  addition, it displays general TCP/IP/UDP/ICMP statistics for your local
  computer.

• Program name: CurrPorts
• Web site: http://www.nirsoft.net
• Description
  CurrPorts displays the list of all currently opened TCP/IP and UDP ports
  on your local computer. For each port in the list, information about the
  process that opened the port is also displayed, including the process
  name, full path of the process, version information of the process
  (product name, file description, and so on), the time that the process
  was created, and the user that created it.
  In addition, CurrPorts allows you to close unwanted TCP connections, kill
  the process that opened the ports, and save the TCP/UDP ports information
  to HTML file , XML file, or to tab-delimited text file.
  CurrPorts also automatically mark with pink color suspicious TCP/UDP
  ports owned by unidentified applications (Applications without version
  information and icons

• Program name: IPNetInfo
• Web site: http://www.nirsoft.net
• Description:
  IPNetInfo is a small utility that allows you to easily find all available
  information about an IP address: The owner of the IP address, the
  country/state name, IP addresses range, contact information (address,
  phone, fax, and email), and more. This utility can be very useful for finding the origin of unsolicitedail. You can simply copy the message headers from your email software
  and paste them into IPNetInfo utility. IPNetInfo automatically extracts
  all IP addresses from the message headers, and displays the information
  about these IP addresses.

• Program name: SmartSniff
• Web site: http://www.nirsoft.net
• Description: SmartSniff allows you to capture TCP/IP packets that pass through your network adapter, and view the captured data as sequence of conversations between clients and servers. You can view the TCP/IP conversations in Ascii mode (for text-based protocols, like HTTP, SMTP, POP3 and FTP.) or as hex dump. (for non-text base protocols, like DNS).

• Program name: TCPView for NT/2000/XP/9x
• Web site: www.sysinternals.com
• Description: Display TCP connection on local PC.

• Program name: NetMonitor