XnViewMP is a free software to view, organise, convert graphics and photos files or to create slide show, contact sheet, HTML pages.
XnView MP Features
Dolphin is a file manager for KDE focusing on usability. Has three view modes: Icon, Detail and it used to have Column View like in Finder (it is not available in current version due to problems with maintaibility). Supports FTP, SCP and other protocols. Highly configurable.
Dolphin File Manager Features
MPC-BE is a free and open source audio and video player for Windows.
MPC-BE is based on the original Guliverkli project and "Media Player Classic Home Cinema" project, contains additional features and bug fixes.
GNOME Files, formerly known as Nautilus, is the official file manager for the GNOME desktop, giving the user a simple way to navigate and manage its files.
GNOME Files Features
Free dual-pane file manager for Windows featuring tabs, columns, themes, long filename support, image converter, regex renaming and many other unique features.
Thunar is a modern file manager for the Xfce Desktop Environment. Thunar has been designed from the ground up to be fast and easy-to-use. Its user interface is clean, intuitive, and customizable. Thunar is fast and responsive with a good start up time and directory load time.
SageThumbs is a Windows Explorer context menu extension allowing Windows users to preview enormous amounts of image formats directly within Windows Explorer.
The latest version 18.104.22.168 was released on May 9th, 2017.
gThumb is an image viewer and browser for the GNOME Desktop. It also includes an importer tool for transferring photos from cameras.
Icaros is a collection of lightweight, high quality, Windows Shell Extensions, which is capable of providing Windows Explorer thumbnails for essentially any video media filetype.
UltraExplorer is a Windows Explorer replacement that will change the way you think about file management. Other Explorer replacement applications duplicate the same old paradigm introduced by Microsoft in Windows 95.Discontinued
The official website is no longer available. Last version, 22.214.171.124, released in July 2009, can be still downloaded from SoftPedia.
Thumbico displays the thumbnail or icon of any file, image, document, video or program from your Desktop or computer. But unlike Windows, which shows you small, standard sized images, Thumbico gives you the large, any size "uncensored" version.
Very powerfull two-panel interface commander. Unreal Commander has UNICODE support, Extended search of files, Multi-rename tool, Synchronization of directories, Support of archives ZIP, RAR, ACE, CAB, JAR, TAR, LHA, GZ, TGZ , Built-in FTP client, Folder tabs, Support of...
By default, macOS doesn't provide previews and thumbnails for WebP, a modern image format providing superior, lossless and lossy compression for images on the web. WebPQuickLook fills this gap by allowing you to see previews and thumbnails of .webp images on your Mac.
reThumbnail, which is re (re: a prefix that means”again” to indicate repetition) + thumbnail (small image representation to make it easier and faster to look at a video)