Version 2.3, ACD Systems. Full gamma support; progressive
display of interlaced images (sparse method); older versions ignored the
background chunk and incorrectly displayed grayscale images with alpha channels.
Not tested recently.
- AI Picture Explorer
Version 1.2, Applied Insights. Conversion
capabilities; can autogenerate web pages with thumbnail images.
- AI Picture Utility
Version 2.5, Applied Insights. Conversion
- Alter Image 32
Version 1.0a, Nun's Meadow Software. Conversion
Version 1.80 (``build 273''), Photodex. Conversion capabilities;
claims gamma support. CPIC is also sometimes known as CompuPic.
Version 2.02, Briggs Softworks. Encryption capabilities.
Versions prior to 2.0 were also available for Windows 3.x.
- DeBabelizer Pro
Version 4.5, Equilibrium. Conversion capabilities;
claims gamma support.
- Drag And View
Version 4.0c, Canyon Software. Conversion capabilities.
Version 2.0, WinCorner. Integrates into Windows File Manager
- GIF Construction Set
Version 1.0Q, Alchemy Mindworks.
- Graphic Viewer
Version 1.0, PrimaSoft PC.
- Graphic Workshop
Version 1.1Y, Alchemy Mindworks. Conversion
capabilities; no gamma support in older versions. Not tested recently.
- HiJaak PRO
Version 4.5, IMSI. Conversion capabilities, but apparently
not to PNG. HiJaak was originally developed by Inset, which was acquired by
Quarterdeck, which finally sold the product to IMSI.
Version 5.0, Spicer Corporation. Conversion capabilities.
Version 2.31, Arcata Pet Software.
Conversion capabilities; claims gamma support. Related software includes
WWPlus32 (multiformat wallpaper manager) and WWSaver32 (image-based screensaver).
Version 2.90, Skiljan Irfan. Conversion capabilities.
- KeyView Pro
Version 6.0, Verity. Conversion and Netscape plug-in
capabilities. FTP Software sold KeyView to Verity late in 1997.
Version 1.6, Brandyware Software. Conversion capabilities.
- Photonyx Viewer
Version 2.0, Chrome Imaging.
Version 1.3, ACD Systems. Integrates into Windows
Version 1.81, Andrew Anoshkin.
- PixelGraphicLibrary demo viewer
Version 1.0 beta 5, Peter Beyersdorf.
Principally an imaging toolkit, but includes a demo viewer app.
Version 2, ACK Software. Conversion capabilities.
Version 3.10, Polybytes. Conversion capabilities.
- QuickTime PictureViewer
Version 3.0, Apple Computer. Full gamma
and color-correction support via ColorSync; claims full alpha support (but
not clear in what form). PictureViewer completely supersedes the Tiny
Viewer demo app that Sam Bushell included with his QuickTime 2.5
PNG-Importer. Note that any QuickTime-aware application (even Apple's
SimpleText) can be used to view PNG images if QT3 is installed.
- Quick View Plus
Version 5.0, Jasc Software. This is software with history.
Originally developed by Mastersoft as Viewer 95, both it and
Mastersoft were acquired by Frame, which was almost immediately
acquired by Adobe. The program and associated technologies were
rereleased as Adobe File Utilities by Mastersoft in 1996, then sold to
Inso in 1997. Inso gave the software its current name, but apparently
sold or licensed the rights to the Windows version to Jasc in 1998.
Inso still sells the Unix version and possibly the Windows version,
but apparently only to government and ``enterprise'' customers.
- Riptide Photo Studio
Version 1.0, Vorton Technologies. Conversion
Version 1.2.00, CQuick Technologies.
Version 3.30, Cerious Software. Conversion capabilities,
but without the ability to write interlaced or transparent PNGs; possibly full
gamma support; can autogenerate web pages with thumbnail images.
Version 3.6, Lawrence Gozum. Conversion capabilities.
- WebGraphics Optimizer
Version 4.0, Plenio Software Solutions.
Conversion capabilities; Version 2.x had broken support for two-bit images,
no gamma support, and no control over compression level or filtering (to the
extent that it would happily write an output file larger than the input).
Not tested recently.