An Atlas of cyberspaces - topology Maps is a great website that gives a lot of information on network mapping and the topology of the web. It's really worth a look at.
Lumeta Internet Mapping Project is the one that was started at the Bell Labs in 1998. It is the most well-known internet mapping project so far.
netCrunch is not entirely an Internet mapping program; however, it is a network monitoring and management program. It maps out the routers that connect to the web in different areas. I think in a way this kind of network mapping programs help users to visualize the hubs of connection.
grokker is a web search software that visualize everything into an visualization representation.
the opte project provides static and dynamic images of the maps of internet.
I am currently playing around with kaon (however, I think the site is down.) I haven't figured out how this thing works exactly but it does pretty much the same thing as touchgraph
On an interesting note, musicplasma.com is a great mapping program for the music industry. It links all the artists together by how close they are musically. The artists are organized into clustered with their similar music style and era. It also give a popularity rating for the artist in relevant to his/her music style. I think this is better than an internet mapping program because it is more relevant to what we care about.
