It is a tool to analyst the dependence of ELF/Mach-O. When you port an ELF library to your own operating system, having a dependency graph is important.
Tutorial:
https://sourceforge.net/p/elf-dependency-walker/wiki/tutorial/
Simple tool to parse the contents of /proc or /sys entries and graph their values. An oscillosope for software types. Intended for developers, admins or the curious to understand the performance and behaviour of their systems.