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.

Changelog:
- This version improves file previews on Windows, updates supporting libraries (including a security fix in c-ares), and adds GeoIP support.

Program Information Category: Internet and communication Type: Free Version: 1.1.2 Size: Works on: Windows, Mac Product page: here