XnView 1.97.6 Final Portable 
XnView 1.97.6 Final + Portable | 12.2 Mb + 9.2 MB
XnView is a utility for viewing and converting graphic files.
Support of more than 400 graphics formats.
XnView exists for Windows, MacOS X, Linux x86, Linux ppc, FreeBSD x86, OpenBSD x86, NetBSD x86, Solaris sparc, Solaris x86, Irix mips, HP-UX, AIX.
The most important features are: Import about 400 graphic file formats and Export about 50 graphic file formats.
Features:
Import about 400 graphic file formats
Export about 50 graphic file formats
Multipage TIFF, Animated GIF, Animated ICO support
IPTC, EXIF
Resize
Copy/Cut/Crop
Adjust brigthness, contrast
Modify number of colors
Apply filters (blur, average, emboss, )
Apply effects (lens, wave, )
Fullscreen mode
Slide show
Picture browser
Batch convert
Thumbnail create
Screen capture
Contact Sheet create
Multi-page file create (TIFF, DCX, LDF)
TWAIN support (Windows only)
Print support (Windows only)
Drag & Drop support (Windows only)
44 languages support (Windows only)
And many many other things
XnView 1.97.6 Final
XnView 1.97.6 Portable
Extract and run XnViewPortable.
Copy Adobe Photoshop Plugins (*.8bf) in Data\8bf
Edit XnViewPortable.ini to fix Cache:
Cache=Disabled Default
Cache=Temp Cache set in Windows Temp folder deleted when leaving
Cache=Portable Cache set in Data\Cache
If you dragn drop a file on (or open with) XnViewPortable: it will be opened in XnView.
Integrated in shell explorer while running: right click on a picture to show thumbnail, convert, send to ImageShack.
Settings and integration of installed XnView should be preserved.
Windows