Maverick Photo Viewer is a simple image viewer for PCs.
The program looks and feels much like the Windows Photo Viewer. You can associate it with image file types (there's support for more than 30), then double-click to open one, and a tiny toolbar gives you basic viewing and other options.
Maverick adds basic image edits and modifications, like resize, and gamma, brightness and contrast tweaks. These can be just for viewing, or you can save the file in the same (or another) format.
Your image may be resized to standard 2160, 1080, 720 px heights and custom heights with one keystroke.
The program is also able to set the current image as your wallpaper, or directly save it as a favicon.
Just about everything may be controlled by hotkeys. If you're familiar with ACDSEE, good news - they're the same, apparently. But if you're not, no problem, they can be fully customised to whatever you like.
It's not going to replace IrfanView in the foreseeable future - or ever, probably - but Maverick Photo Viewer is fast, easy to use, and extends the standard Windows viewer with a few useful extras.