QuickLook - Bring macOS “Quick Look” feature to Windows.
KO APPROACH - Speed up file navigation in Windows Explorer
eye of MATE - The MATE Desktop Environment is the continuation of GNOME 2. It provides an intuitive and attractive desktop environment using traditional metaphors for Linux and other Unix-like operating systems. MA
Eye of Gnome (eog) - Simple image viewer for the GNOME desktop.
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.