IconsExtract - Extract icons and cursors stored in EXE, DLL, OCX, CPL files
UMLGraph - UMLGraph is a professional automated drawing tool that allows the designers the declarative specification and drawing of UML class and sequence diagram.
IconViewer - Bot Productions's IconViewer utility allows you to view, copy, and save the icons in a file through its property sheet.
KeyLines - The JavaScript toolkit for graph visualization
Network Weathermap - Network Weathermap is a robust and open-source network visualization solution that enables you to use network statistics for creating live network maps.
Dia - Dia is a GTK+ based diagram creation program for GNU/Linux, MacOS X, Unix, and Windows, and is released under the GPL license.