Dependency Walking Tool Homes

• Original Dependency Walker: Thread describing it's fate and lucasg's version
• LucasG's Modern Dependency Walker
• Sid's .NET Dependency Viewer for .NET assemblies only
• DLL Exporter (part of the Nirsoft Suite)
• OLE Object Viewer

Note that Symantec in corporate environments doesn't like Sid's version, but will let it run anyway.