Phototheca!

FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor. It has a nice array of features that include image viewing, management, comparison, red-eye removal, emailing, resizing, cropping and color adjustments. Its innovative but intuitive full-screen mode provides quick access to EXIF information, thumbnail browser and major functionalities via hidden toolbars that pop up when your mouse touches the four edges of the screen. Other features include a high quality magnifier and a musical slideshow with 150+ transitional effects and more. »

digiKam is an advanced digital photo management application for linux/KDE, which makes importing and organizing digital photos a "snap". The photos are organized in albums which can be sorted chronologically, by folder layout or by custom collections.

Shotwell is an open source photo organizer designed for the GNOME desktop environment.

JPEGView is a small and fast viewer/editor for JPEG, BMP, PNG, GIF and TIFF images. On-the-fly image processing is provided - allowing to adjust typical parameters as sharpness, color balance, contrast and local under-/overexposure.

gThumb is an image viewer and browser for the GNOME Desktop.

Zoner Photo Studio is a feature-rich image viewer and image organizer software. It also features many editing functions including 16 bits per color channel. It is one of the first image organizers with support for GPS and 3D technologies and aims to be a universal "all-in-one" solution for the whole process of managing and processing digital photos, including acquiring, editing, archiving, and publishing them.

FastStone MaxView is a fast, compact and innovative image viewer that supports all major graphic formats. Its intuitive layout lets you view images in a variety of ways. It even lets you view images in password-protected ZIP and RAR archive files directly and instantly, which is a perfect solution for viewing private images. It is a handy tool for quickly viewing, rotating, resizing, cropping, annotating and printing images.

QuickViewer is a graphic image viewer for comfortable browsing of many images.

You can use the Photos app to view or edit photos and videos in your Pictures library and on OneDrive, and to import photos and videos. The Photos app includes a wide range of editing options to enhance your photos, from automatic fixes to advanced adjustments. After you've finished editing your photos and videos, you can then share them with friends and family without leaving the app.

Imaging is a Collection of Image Related Tools (Image Viewer, Image Converter, Image Resizer, Image Optimizer, etc).

Server-based photo management software from Daminion Software. Single- and multi-user for small teams and creative professionals.

Hardware accelerated image viewer and image sequence player. It supports a large variety of formats, including many camera RAW images.