Knockoutjs debugging extension.
Adds a extra sidebar in the elements pane of the chrome dev tools with the relevant knockout context and data for the selected element.
Very usefull if you got large/nested viewmodels.
Allows to add tracing to every observable/computed.
Allows to edit observables from the console.(https://github.com/timstuyckens/chromeextensions-knockoutjs/wiki/Editing-viewmodel-binding-values)
Source code is on github: https://github.com/timstuyckens/chromeextensions-knockoutjs
Tip (based on comments)
You can view the content of any observable in the viewmodel in the ‘$root_toJS’ variable.