Yes! NodeJS is not limited to web applications. Machine learning concepts can be explored using the plethora of NodeJS Libraries including:
1. ml.js: Includes a vast list of libraries under different categories such as unsupervised learning, supervised learning, artificial neural networks, regression, optimization, statistics, data processing, and math utilities.
2. Brain.js: A library written in JavaScript for neural networks that can be used with Node.js as well as in the browser.
3. Synaptic: Synaptic is another JavaScript neural network for Node.js.