The Insecure.org developers have announced the release of version 5.0 of Nmap, their popular network scanner and mapper. The release features nearly 600 significant changes and the developers consider it to be "the most important Nmap release since 1997". Major improvements to the network scanner include the addition of the Ndiff scan comparison tool and the Nmap Scripting Engine
Kodak has released a free scanner application for Linux called ScanTWAIN that promises "production quality scanning." The software is released under the GNU General Public Licence (GPL) version 2 and comes with a complete GUI that supports all of the options of its Windows counterpart. Support is included for duplex scanning with automatic feeding of multiple pages through an Automatic Document Feeder (ADF). An included API using TWAIN 2.0 allows users to create custom imaging solutions that can use individual components over a network. Kodak products are also supported by the SANE Project (Scanner Access Now Easy) that provides compatibility with imaging applications such as the GIMP and XSane.
RadialNet is a network visualization tool developed for Umit during the Google Summer of Code 2007. In Umit it's called UmitMapper. It consists in a graphical tool to illustrate the Nmap network mapping. You can see a video demonstration based on version 0.3 here.