http://www.owasp.org/index.php/OWASP_WebScarab_NG_Project

WebScarab-NG is a complete rewrite of the old WebScarab application, with a special focus on making the application more user-friendly. To this end, WebScarab-NG makes use of the Spring Rich Client Platform to provide the user interface features. By using the Spring Rich Client Platform, WebScarab-NG automatically gains things like default buttons, keyboard shortcuts, support for internationalisation, etc.

Another new feature is that session information is now written into a database, rather than into hundreds or thousands of individual files. This makes disk space utilisation and things like archiving of sessions a lot easier.

Ultimately, WebScarab-NG will have all the significant functionality that the old WebScarab had, although it will be reorganised quite significantly, in order to make the application more user friendly.

The user interface has changed quite a lot from the old WebScarab. Apart from the new default Look&Feel (JGoodies), you will see that the conversation viewer has changed quite a lot. The old “Raw” view is still there, but the Parsed version has changed quite dramatically – for the better, I hope you’ll agree!

The Parsed view now shows the request and response details in a tree form, rather than in individual text boxes. This makes the interface look a lot cleaner, and more importantly, is a lot more compact. It also makes it a lot easier to include features like automatically breaking out URL parameters, and multiple cookies into their own nodes, where it is a lot easier to view the individual parameters. We also show the request and the response next to each other, rather than one above the other, since most people seem to have more horizontal real-estate than vertical. The split between request and response can easily be adjusted by dragging, as can the split between the headers and the message content