The Photoshop High Pass Multi Sharpening Plugin is a great little plugin that allows you to easily add subtle sharpening to your photographs with ease.

What Does The Multi-Sharpen Plugin Do
The plugin uses the Photoshop High Pass algorithm to perform muti-stage based on four different sharpening layers.
You can either use the standard option which uses predefined radius settings or you can use the custom option whereby you set the desired radius manually.

Each of the four sharpen layers can be turned on/off and the opacity can be easily changed by using one of the slider controls.

Compatible With:
Photoshop version 24.0 or newer
Mac OSX
Windows

Installation:
After downloading the file, unzip it to your desktop and then double click the enclosed ccx file and then follow the on-screen instructions.