Wireshark is the world's foremost network protocol analyzer, and is the de facto (and often de jure) standard across many industries and educational institutions.

The short changelog:

• Wireshark has a spiffy new start page.
• Display filters now autocomplete.
• A 64-bit Windows (x64) installer is now provided.
• Support for the c-ares resolver library has been added. It has many advantages over ADNS.
• Many new protocol dissectors and capture file formats have been added.
• Macintosh OS X support has been improved.
• GeoIP database lookups.
• OpenStreetMap + GeoIP integration.
• Improved Postscript(R) print output.
• The preference handling code is now much smarter about changes.
• Support for Pcap-ng, the next-generation capture file format.
• Support for process information correlation via IPFIX.
• Column widths are now saved.
• The last used configuration profile is now saved.
• Protocol preferences are changeable from the packet details context menu.
• Support for IP packet comparison.
• Capinfos now shows the average packet rate.

Program Information Category: Internet and communication Type: Free Version: 1.2.0 Size: 17.4MB Works on: Windows, Linux, Mac Product page: here