1. Sublime Web Inspector
2. Js Bin
This code provides a simple wrapper for the console's logging methods, and was created to allow a very easy-to-use, cross-browser logging solution, without requiring excessive or unwieldy object detection. If a console object is not detected, all logged messages will be stored internally until a logging callback is added. If a console object is detected, but doesn't have any of the debug, info,warn, and error logging methods, log will be used in their place.
5. JS Hint
Debug is a small library for logging debug messages. Since it is just a wrapper around console.log, it works in both Node and the Browser. It allows you to filter logging output without changing your source and it also outputs time differences which lets you easily tell how much time has elapsed between log message.
This tool helps locate bugs in the Java programs by implementing static analysis. FindBugs is available for free and can be used as a GUI or plugin for NetBeans, IntelliJ, Eclipse and mode IDEs.
hyperProxy is a node.js is a local proxy for using local files for debugging and testing of production sites by front-end developers. It’s easy to setup, configure, and use, and avoids using your live production site (and your users) as a testing ground.