Dropresize is another freeware tool, which will resize all the images in a folder. However, in this case, it will resize the images automatically, whenever new files are placed into the directory.
Also Read: Compress Image Size on the Fly
Once you download Dropresize, double click it to run the software. Once it is running, choose the watch folder, where you will drop images for resizing. The software will then monitor the folder and optionally sub-folders for any new image files, and automatically resize them.You can also choose the maximum size and quality of the resized images.
Dropresize is a portable software and does not require installation, once you run the software it will run in the system tray monitoring for new images.
Overall Dropresize does its job pretty well. However, the only limitation right now is that it works with only JPEG images. The author has promised to add support for other image formats in future though.