I love software, especially free...and if I really like it and use it regularly I look for a donate button on the website. Over the years, across many computers, I have used quite a variety of programs so I thought I'd write a few posts about my favorites.
IrfanView, is free for non-commercial use. I first used it back in the late 1990's. It's hard to believe that the author continues to add enhancements and still keeps it free. Yes, I made a donation. If you download and install it, please be sure to also download and install the plug-ins for some extras.
IrfanView is so much more than an image viewer. I can change file types, make my own .ico files, listen to and watch files, crop images, resize and optimize files, add special effects, flip/rotate images, insert text and watermarks, auto-adjust coloration on photos, manually change coloration settings and much more. But, this is NOT a Photoshop type product so be aware of its limitations. [Check out GIMP or Zoner for better Photoshop replacements. I've downloaded both but as a non-Photoshop user, I find Zoner easier to use.]
I probably use maybe 25% of the capabilities and this program is the one that keeps me from moving to a Mac....this is a Windows only product and so far I've been unable to find a satisfactory replacement.
On a scale of 1 to 5 stars, this is definitely a 5 star winner with bonus points for being free. The only downside I have ever found is the need to check manually for updates. I can live with that!
PS. If you are on a Mac, I'd love to hear about anything you think might be a good replacement.