The collection comprises:

• dvibook, which will rearrange the pages of a DVI file into ‘signatures’ as used when printing a book;
• dviconcat, for concatenating pages of DVI file(s);
• dviselect, which will select pages from one DVI file to create a new DVI file;
• dvitodvi, which will rearrange the pages of a DVI file to create a new file; and
• libtex, a library for manipulating the files, from the old SeeTeX project.

The utilities are provided as C source with Imakefiles, and an MS-DOS version of dvibook is also provided.