Hornil Photo Resizer is a powerful tool for processing an entire folder of photos at once.
Despite its name, the program isn't just about resizing images. It can also rotate and flip them, apply various filters (auto level/ contrast, sharpen, more), add an image watermark, and batch rename them according to various rules.
The core resizing function is reasonably configurable. As well as setting an image to a fixed resolution ("640 x 480", for example), you can also adjust the height alone, the width alone, the longer or shorter lengths.
The batch renaming function is useful, too. In a click or two you can take the source file name and customise it with a date (in your choice of format), a serial number, extra text or whatever you like.
Some of the other tools are rather more basic. Most of the filters have no options, so you can add a "Sharpen" effect, but there's no way to customise how it works. We would have appreciated a text watermark option, too.
The interface has some issues. Although you're able to carry out multiple actions on an image - resize, rotate and sharpen, maybe - these are all configured in separate panes, and there's no single place where you can view everything you've asked the program to do.
The lack of documentation is another problem. As we write, clicking Help > Quick Start Guide takes you to the guide for a different program, while Help > Online Manual just displays an error message.
Still, Hornil Photo Resizer does have some promise. You can already use it to quickly rename and resize a batch of photos. There are useful configuration options on hand. The program is free, with no adware or other hassles, and with a little more development it's going to be a very capable batch photo processing tool.