Viewers

Able Photo Slide Show
Image viewer designed to display all digital photos and graphic files in a folder as a slide show using many transition effects, each image being shown for some predetermined time before going on to the next.
http://www.graphicregion.com/photoslideshow.htm

cam2pc
Image Browser with features to view, organize, modify, and share digital pictures, it also features a image downloader to transfer pictures from a digital camera to the PC.
http://www.nabocorp.com/cam2pc

Cartesian Products, Inc.
Image viewing software that integrates with the web browser to provide viewing capabilities over the Internet, Intranets, or local disks.
http://www.cartesianinc.com/

Context Magic
Offers two viewers; Context ThumbView a picture viewer to preview images directly in the right-click menu, and Instant ThumbView displays image thumbnails in a tool tip window, when mouse pointer is hovered over an image file in Windows Explorer. Requires: Windows 98/ME/2000/XP/95/NT and Internet Explorer 4.0 (or later).
http://www.contextmagic.com/

Image Viewer CP ActiveX Control
Supports a lot of popular image file formats, including BMP, GIF, JPEG, PNG, ICO, and TIFF. Also includes VB, VFP, Delphi, Access source code samples. By Viscom Software.
http://www.viscomsoft.com/imageviewer.htm

Inzomia Viewer 2
Image viewer offering windowed and fullscreen view modes. Skinned user interface lets to view, pan, zoom and rotate JPG, PNG, BMP and TGA images including images in compressed ZIP files. Documentation, downloads, FAQs, and support forum.
http://www.izview.com/

IrfanView Graphic Viewer
Free for non-commercial use, 32-Bit graphic viewer for Win 9x/ME/NT/2000/XP, with multiple (animated) GIF support and Multipage TIFF support. Features print support, scan (TWAIN) support, slideshow, and batch conversion.
http://www.irfanview.com/

IvanView
Image viewer and browser with extended capabilities.
http://www.ivanview.com/

MadLogic ScreenShot
Quickly and easily capture images of specific windows, the entire desktop, or any rectangular on-screen area.
http://www.madlogic.com/

Markosoft Image Viewer
View digital images using a thumbnail viewer or full screens slide show. Supports most major image formats.
http://www.markosoft.net/imageviewer.html

Panorado
Image viewer available as Windows application and Java applet; with special support for large and panoramic images. With background information on image metadata, panoramic pictures and integrating GPS coordinates.
http://www.panorado.com/

PicScan
Creates interactive image slideshows and provide thumbnail browsing for Mac OS computers. The keyboard can be used to change the slideshow behavior.
http://www.imaja.com/picscan/index.html

XnView
Software to view and convert graphics files. Support of more than 200 graphics formats, and runs on many platforms.
http://pagesperso-orange.fr/pierre.g/indexgb.html