STDU Viewer 1.4.16.0

Home page
http://www.stdutility.com/stduviewer.html

"STDU Viewer is a document viewer for multiple file formats. The goal of
this software is to replace the multiple document viewers with a single
simple application. STDU Viewer supports TIFF, PDF and DjVu documents
format. This is most popular formats for scientific and technical
documentation."

"STDU Viewer free for non-commercial uses."

Download size - 1.5 MB.

I have tested it briefly only with several PDF and DjVu documents (books
and magazines).
No visualization and copy/paste problems.

This program is not portable and probably cannot be.
The installer writes files in the folders
C:\Program Files\STDU Viewer\
and
C:\Program Files\Common Files\STDUtility\
It writes some stuff in the registry - mainly file type and dll
registration data.
For some reasons the program stores user's settings in the file
My Documents\STDUViewer\STDUViewerSetting.xml

The uninstaller is almost perfect - it did not delete only one registry key
HKEY_CLASSES_ROOT\Software\Microsoft\Windows\Curre ntVersion\Explorer\FileExts\.djvu
and the user's settings file was left.

IMHO currently this program is rather immature but it's future
development may be promising.