Wikipedia
NotesPeek
NotesPeek is a utility that allows navigation and display of the complete contents of Lotus Notes database files. It breaks out the database components in a tree structure, while also providing access to both low level and high level database components. It can show data and settings that otherwise cannot accessed.
NotesPeek was written by Ned Batchelder, who wrote it for his own use. He was later the project leader for Domino Designer.