You are probably looking for network tools netwib, netwox and netwag.

Netwox is a toolbox containing 222 network features.
Netwag is a graphical front-end to netwox.
Netwib is the C network library which permitted to create netwox.

They are not actively updated since September 2004.
The projects reached their end of maintenance in 2007.

You can find the full project on Source Forge to download. These tools are written by Laurent Constantin.