web-page-replay

"Record web pages using a local DNS and a local web server which act as proxies and records performance metrics in addition to the actual resources."

Node Inspector

dannycoates/node-inspector - GitHub: "Node Inspector is a debugger interface for nodeJS using the WebKit Web Inspector."

Introducing Knockout, a UI library for JavaScript

Knockout is a JavaScript library that makes it easier to create rich, desktop-like user interfaces with JavaScript and HTML, using observers to make your UI automatically stay in sync with an underlying data model. It works particularly well with the MVVM pattern, offering declarative bindings somewhat like Silverlight but without the browser plugin.

CSS Timing Bookmarklet

This bookmarklet loads this script which uses querySelectorAll on all the selectors in loaded stylesheets and then sorts their eval time.