CanJS DevTools is a Chrome extension developed by the DoneJS Core Team. It is a free tool that provides developers with a range of powerful features for building applications with CanJS.

With CanJS DevTools, developers can easily view and edit their ViewModels, making it more convenient to work with data and make necessary changes. The extension also offers the ability to visualize dependency graphs for elements and ViewModels in the application, helping developers understand the relationships between different components.

One of the key features of CanJS DevTools is its ability to debug changes to observables using the CanJS queues system. This allows developers to track and analyze changes to observables, making it easier to identify and fix any issues that may arise.

Overall, CanJS DevTools is a valuable extension for CanJS developers. Its range of features and intuitive interface make it a must-have tool for anyone working with CanJS applications.