If you want to flip or mirror images then you can use the free GIMP tool. It is very easy to do so using this image editor for Windows PC.

The GIMP open source graphics program includes a number of editing tools, including a cropping tool and selection tool. There's no circular cropping tool in GIMP, but you can use the program's ...

How to Use a Paintbrush With Gimp. The GNU Image Manipulation Program is a free alternative to pricey image editors. This no-cost, open source software runs on Linux, UNIX, Windows and Mac ...