Viewers

Apicviewer
Download and display pictures from USENET newsgroup postings. Lets you view pictures as they are being downloaded and you can browse them off-line.
http://www.aadsoft.com/apicv/intro.htm

CoffeeCup Free Image Viewer
It has built in Email, FTP, and Zip functions to select a group of images and email them to a friend, upload them to websites, or create a Zip file, all from within the program.
http://www.coffeecup.com/image-viewer/

ForceVision Image Viewer
A bitmap image viewer with advanced graphics manipulation capabilities.
http://forcevision.net

Free ViewBuild 3D Viewer
Free viewer for viewing and walking around models created with ViewBuild software.
http://www.viewbuild.com

Geo3D
Standalone 3D Metafile (3DMF) viewer, for navigation through space rather than only manipulate the models. Available in English, French, and German.
http://www.topoi.ch/

Image Viewer by Optmossis
Graphic viewer supports GIF, JPEG, BMP, and other formats.
http://optmossis.gq.nu/

IrfanView
Free for non-commercial use, 32-Bit graphic viewer with multiple (animated) GIF support and multipage TIFF support. Features print support, scan (TWAIN) support, slideshow, and batch conversion. [Windows]
http://www.irfanview.com/

MS Technology
Provides a viewer that supports various image formats such as MODCA, IOCA, PTOCA , TIFF, GIF, JPEG, PCX, DCX, CALS, AFP, Windows Bitmaps, ASCII Text Data, and OS/2 Bitmaps.
http://www.ms-technology.com/

MView
For Windows, supports PCX, TIF, BMP, DIB, TGA, EPS, WMF, GIF, IMG, WPG, JPG, and DCX.
http://icc.dk/freeware/mview.htm

PhotoView
Compact photo viewer for Windows.
http://www.softboard.net/

PictView
A multi-format image viewer and converter; supports more than 140 versions of 40 file formats. Available for MS-DOS and Windows. - Developer's site.
http://www.pictview.com/

QJpeg Image Viewer
View and preview image files easily, adjust brightness, colors, crop, stretch, and resize.
http://www.geocities.com/prasanna_jayasekara/

SimpleMiser JPG
JPG picture viewer, perfect for sending pictures on CD. Just one stand-alone EXE file, finds pictures and puts picture folder names on buttons. Unobtrusive text ad link on opening screen only.
http://micromiser.com/miserjpg.htm

StickyView
Allows one to view favourite image collections from recursive directories either individually or in a slideshow.
http://www.stickyview.com/

SurfPics
Image search themed web browser/graphics viewer that delivers easy access to image search engines and image galleries.
http://www.4comtech.com/surfpics/

TexView
Fast texture browser for easy viewing and manipulation of tiled textures or backgrounds.
http://www.btinternet.com/~ablumsohn/scgraphic.htm#texview

TTNview
Viewer of EXIF information recorded by digital cameras in image files. Information about image and shooting conditions, data about the camera and settings, supports most digital cameras, and reads all standard EXIF tags and several proprietary formats. Product specifications, screenshots, user guide, mailing list, and downloads.
http://myalpha.dls.net/ttnview

Vallen JPegger
An international image viewer with support for 15 languages and 40 different image formats. [Win32]
http://www.vallen.de/freeware/index.html

VerSee
Graphics viewer, photo editor, image converter, picture galleries and screen capture. Performs instant zoom and stretch, orders pictures in a personal sequence, indexes images with the same name. [Win 9x/2000/Me/NT]
http://www.versee.com/

11view
A simple image viewer designed to show, print and convert images with the highest visual quality. Includes the icon/cursor compiler and compiler of animated GIFs.
http://www.stratopoint.com/11view.htm

Visualizer Image Browser
An image tool which allows one to browse 20 different image formats.
http://www.freeimagebrowser.com/

XIOview
A Java applet for zooming images on websites, with image filtering capabilities.
http://www.xio.biz