DVIWindo - a MS Windows based previewer for DVI files: 

DVIWindo is the only previewer for DVI files that uses scalable fonts  on
IBM PC compatibles.

DVI files are produced by TeX, the premiere typesetting language. TeX is
particularly adept at mathematical equation layout, superb paragraph line
breaking, extended support for ligatures, and excellent hyphenation (among
other things).

General: 

DVIWindo can print to any device with a Windows printer driver  (including
some fax boards).  So it actually combines the funtionality of two
traditionally distinct entities: the DVI previewer and the DVI-to-printer
driver.

DVIWindo can use any outline font technology fully supported in Windows.
That is, Adobe Type 1 format, TrueType, BitStream FaceLift and so on. Say
goodbye to those complex directory hierarchies full of bitmap fonts in
assorted sizes!  DVIWindo comes with Adobe Type Manager (ATM).

One consequence of the use of outline fonts is that DVIWindo can display a
document at any magnification, and use fonts at arbitrary point sizes.  
You can zoom in on selected parts of the document.  You can `drag' the
displayed image around on screen to where you want it.

It is now possible to preview files calling for arbitrary scalable outline
fonts, not only the Computer Modern fonts traditionally used with TeX.  
TrueType fonts supplied with Windows can finally be used in TeX.

Advanced Features:

Aside from all the usual things you would expect from a sophisticated DVI
previewer/printer-driver, DVIWindo also has some unusual extensions.

DVIWindo allows `copying' of a selected region to the clipboard.  From
there it can be `pasted' into other Windows applications.  And what is
transferred is NOT a bitmap.  It can be arbitrarily positions, scaled and
clipped in the receiving application.  This simple extension leads to many
novel uses. For example, typeset your complex mathmatical expressions
using TeX, then paste these into your favorite WYSIWYG application.  Use
Tex to typeset captions for figures produced in a drawing program and have
the font used in nomenclature match the text itself. And so on.

DVIWindo has a hyper-text facility.  You can set up sensitive `buttons'
that respond to user mouse clicks by changing the viewpoint to that
specified by a `mark'.  Buttons and marks are set up using simple
specials.

DVIWindo supports the Windows 3.1 `drag and drop' feature.  Drag a DVI file
and drop it on the DVIWindo icon and it will be opened and shown on
screen.

DVIWindo can be called from TCI's `Scientific Word' for previewing or
printing. 

DVIWindo supports string search (a great way to deal with a manual that has
a poorly organized index). DVIWindo can show two-page spreads and `grey
out' text for keep scanning through a document for widows and orphans.

DVIWindo supports the specials for inclusion of EPS figures used in TEN
other drivers.  This makes it very likely that you can switch to DVIWindo
without having to rewrite any driver-specific macros.

DVIWindo can show previews in inserted EPSF and EPSI files.

DVIWindo also supports specials for colored text, colored rules and reverse
video text.  It is possible to insert TIFF file images (monochrome/binary,
grey-level or even color).  Foreground and background color of monochrome
images can be other than black on white.

The string search, hyper-text linkage and colored text capabilities make it
possible to generate very nifty online documentation.  For example,
highlight technical terms using color, and create buttons under them that
link you to the glossary where these terms are explained. 

DVIWindo also provides some fun `toy' features such as providing for color
coding of fonts, to help debug font selection macros.  And listing of all
installed fonts, and showing samples of all characters in a selected font
with character widths indicated, for debugging font installation problems
with ATM, for example.

Tools are provided for dumping out a metric file for any Windows supported
scalable font.  This is useful for creating the metric files that TeX
needs so it can typeset text in that font.  Particularly useful for
TrueType fonts.

And it goes without saying that DVIWindo is fast.  Faster than other DVI
previewers. MUCH faster than converting the DVI file to PostScript, and
then converting that to a bitmap, and finally previewing the bitmap say.

DVPSONE:

A companion product, DVIPSONE, is the only program of any kind that uses
partial font downloading of Type 1 fonts.  If you are driving a PostScript
printer or image setter, this can reduce the file size - and virtual
memory usage - by a factor of four to eight.  Particularly useful with
printers that do not have a lot of virtual memory to spare, and for TeX
jobs calling for several dozen fonts.  Tired of waiting for your
PostScript print jobs?

DVIPSONE also comes with a dozen or so utilities including MODEX which can
up your serial line baud rate to 57600. DVIPSONE can be easily called from
DVIWindo in place of the regular Windows PostScript printer driver.

Conclusion:

Dviwindo together with DVIPSONE provide bitmap free support for TeX.

Cost of End-user License:

        DVIWindo is             $175
        DVIPSONE is             $195
        DVIPSONE + DVIWindo is  $285

Source:

Y&Y are the `TeX without BitMaps' people (see ad in TUGboat):

Y&Y makes DVIPSONE, DVIWindo, and fonts  - for use with TeX mostly - in
fully hinted Adobe Type 1 format.

Y&Y, 106 Indian Hill, Carlisle MA 01741  USA
(800) 742-4059,  (508) 371-3286 (voice),  (508) 371-2004 (fax)
CompuServe: 71172,524  (from InterNet: 71172.524@compuserve.com)

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