KO APPROACH - Speed up file navigation in Windows Explorer
QuickLook - Bring macOS “Quick Look” feature to Windows.
Seer - A Windows Quick Look Tool in Qt.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Eye of Gnome (eog) - Simple image viewer for the GNOME desktop.
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.