nomacs
nomacs is a free, open source image viewer, which supports multiple platforms. You can use it for viewing all common image formats including RAW and psd images. nomacs features semi-transparent widgets that display additional information such as thumbnails, metadata or histogram. It is able to browse images in zip or MS Office files which can be extracted to a directory. Metadata stored with the image can be displayed and you can add notes to images. A thumbnail preview of the current folder is included as well as a file explorer panel which allows switching between folders. Within a directory, you can apply a file filter, so that only images are displayed whose filenames have a certain string or match a regular expression. Activating the cache allows for instantly switching between images.
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PhotoViewerPro
True full-screen viewer with photo zoom support. Customizable image magnifier. Powerful image editing tools. Resize/resample, rotate/flip, crop, sharpen/blur, adjust lighting/colors/curves/levels, etc. Eleven re-sampling algorithms to choose from when resizing images. Image color effects, grayscale, sepia, negative, red/green/blue adjustment Image special effects. Annotation, drop shadow, framing, bump map, sketch, oil painting, lens. Draw texts, lines, highlights, rectangles, ovals, and callout objects on images. Clone stamp and healing brush. Superior red-eye effect removal/reduction with a completely natural-looking end result. Multi-level undo/redo capability. One-touch best fit/actual size image display support. Image management, including tagging capability, with drag-and-drop and copy-to/move-to folder support. Histogram display with a color counter feature. Compare images side-by-side (up to 4 at a time) to easily cull those forgettable shots. Image EXIF metadata support.
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Vieas
Vieas is an image viewer and converter with a combination of two window forms. Image Preview is useful for editing and saving. It can be downloaded from the software page. Susie plug-ins are available to load other files or to extract from other archives. Open dialog box, file associations, send to menu, drag, and drop. Zooming, fullscreen, slideshow, always on top, histogram, image information, Png textual data, EXIF data. Crop, resize, expand the canvas, rotary, mirror, flip, equalize, correct (histogram/gamma/brightness/contrast/highlight/shadow/color balance/hue/saturation), and replace color. Negative, unsharp mask, blur, soft focus, denoise, effects (color filter/mosaic/diffuse/emboss/edge detection/posterization/oil painting). Print, set wallpaper, count colors, copy/paste/delete files, and launch the external tool. Key customization and multiple monitor support. Compression level, filter, interlace, gamma, transparent color, etc.
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VieasEx
VieasEx is an image viewer, converter, and retouching tool with a combination of two window forms. Image Preview is useful for editing and saving. It can be downloaded from the software page. Susie plug-ins are available to load other files or to extract from other archives. Undo, redo, select, paintbrush, correct brush, merge text, merge image, crop, resize, Expand canvas, rotation, mirror, flip, equalize, correct (histogram/gamma/brightness/contrast/highlight/shadow/color balance/hue/saturation), replace color, negative. Unsharp mask, blur, soft focus, denoise, effects (color filter/mosaic/diffuse/emboss/edge detection/posterization/oil painting) Other functions print, set wallpaper, count colors, copy/paste/delete file, launch the external tool. Key customization, multiple monitors support. Compression level, filter, interlace, gamma, transparent color, and comment. Open dialog box, file associations, send to menu, drag, and drop.
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