Tone Caliper 1.0 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. We recommend checking the downloaded files with any free antivirus. The actual developer of the software is Light Year Interactive Inc.
From the developer:
Tone Caliper is a photo editor designed around direct interaction with color. Colors from your photo are visualized on an interactive color wheel, where individual color ranges can be selected and moved to adjust their hue, chroma, and lightness while seeing the result in real time.
You may want to check out more software, such as Cardio Calipers, Screen Calipers or Screen Calipers ProScope Edition, which might be related to Tone Caliper.
Automation
Debugging Tools