Author: Igor Tolmachev https://www.itsamples.com/network-activity-indicator.html
License: Freeware
Requires: Win 7

Network Activity Indicator displays the old 'two monitors' icon in Windows 7 that flashed blue to show network activity on the System Tray.
Unlike the original Windows XP utility (that has individual indicators for each interface), this program indicates outgoing and incoming network packets on all available interfaces.

Using
This utility is a standalone executable. Run the program, you'll see a new system tray icon.
Now you can monitor your network traffic in Windows 7 using XP-like 'two monitors' icon in the System Tray.
To customize program settings right click the mouse on the System Tray icon.