Nast is a packet sniffer and a LAN analyzer. It sniff packets and save data in files, checks NIC in promisc mode,build LAN hosts list, find a gw,performs a port scanning, catchs daemon banner etc... It also provides a GTK/ncurses interface.
PVNet is a project providing a virtual network interface. It generates numbers of pure virtual ethernet adapter. It is tested for Linux kernel 3.0.8 on amd64 cpu. Its code contains a kernel patch and module code. You can use it to create many ethernet cards. Each device has a single mac address.
Network load monitor via /proc/net/dev. Though by putting one's NIC into promiscues mode one can also get statistics for a whole LAN.
The 'module name' for CVS is 'netload', the programs name.
Presents stats as numbers and bar graphs.