netmapr is a simple SDL-based network diagram
program that aims to be quick and easy to use
without a huge list of library requirements. It
supports NetViz-style "drilldown" into nested
diagrams.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
This release added the ability to mark objects as "Traffic Flows", which can be toggled on or off. Snap-to-grid, many new objects, UI improvements, improved documentation, and better copy/paste functionality were also added.