Yesterday, I ran across the original eyes.js library for Node.js, which provides improved functionality to replace util.inspect(). It seemed nice and did a good job color-coding the output, but it was missing a few features that I wanted, such as the ability to hide certain types (such as null or undefined properties), as well as the ability to specify stacked color attributes on the output. Initially, I opted to modify the original source project, but as it went on I realized I didn't really like the way it was structured and decided to rewrite the entire module, using colors and underscore to simplify the implementation.
Therefore, I forked the repository and rewrote the entire core library file. My branch is available at https://github.com/gmalysa/spyglass. It is also available to be installed through npm:
npm install spyglass
If you're currently using eyes.js or are just looking for a tool to add powerful inspection/var_dump()-like capabilities to your Node.js project, please give it a try and let me know about any bugs or changes that might be useful!