XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
nomacs - nomacs is a free, open source image viewer, which supports mu
Seer - A Windows Quick Look Tool in Qt.
IrfanView - IrfanView ... one of the most popular viewers worldwide.
sxiv - Simple X Image Viewer. Contribute to muennich/sxiv development by creating an account on GitHub.
CopyTrans HEIC for Windows - A plugin that lets you view HEIC photos on Windows and convert them to JPG by right-clicking.