Network Summary Toolbar
This is a little program I made that integrates with the Windows task bar because I really liked the toolbar that came with Softperfect's Networx but I realised that I didn't use any of the other functionality and the software changed from shareware to paid software. Since I didn't use any other features I figured that I could just make my own.
The coding side of this uses CSDeskBand as a base and then has some very simple rendering which queries the Network Interface Performance Counters "Bytes Sent/sec" and "Bytes Received/sec" once a second and updates the graph. It supports multiple render modes, depending on how you like the bars to look and gives a nice text summary with the latest data that was collected, so you can see what's happening right now.