The SWI-Prolog Cross-Referencer can be used to examine the currently loaded program, creating a hiearchical file overview with icons indicating which files have suspicious code, a dependecy view as shown below and detailed info per file as shown below that. To analyse a program, load it into Prolog and, simply run gxref/0:
XREF - Dependency
File-dependecy view. Views can be created for the whole project, per directory or selectively by adding files to the view.
XREF - File info
Provide information per file on its dependency. Using the command 'Header', the system can create module headers with appropriate import and export headers.