Capsa (Colasoft Application Protocol Sniffer and Analyzer) is a TCP/IP Network Sniffer and Analyzer that offers real time monitoring and data analyzing of network traffic. In addition to Packet Analysis, Capsa also offers Email Analysis, Web Analysis and Transaction Analysis modules, which allow you to quickly view email traffic (by subject and sender), we sites that were visited and more. Other features include custom filtering options, data export, customizable interface and more.