Original extensions by dviout which may not be used by other dviwares and should be remarked:

specials
- Many Image data file specials with parameters which have been used by different dviwares are simultaniously supported.

\special{bmpfile=file_name parameters}

with Susie plug-in for many graphic formats.

reading specials from a file by \special{file=file_name}

tpic specials extensions

dviout specials

Presentation Mode with cover sheet and pause special

source specials (compatible to MikTeX & yap)

Other
Embedding into DVI file