Eye of Gnome (eog) - Simple image viewer for the GNOME desktop.
KO APPROACH - Speed up file navigation in Windows Explorer
QuickLook - Bring macOS “Quick Look” feature to Windows.
qView - qView is a Qt-based image viewer designed to be practical and minimal
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Seer - A Windows Quick Look Tool in Qt.