ShiftSpace (pronounced: §) is an open source browser plugin for collaboratively annotating, editing and shifting the web.Annotate, hightlight, swap images, edit pages with a group
Drawter is a tool written in JavaScript and based on jQuery library. It provides you the possibility to literally draw your website's code. It runs on every single web-browser which makes it really useful and helpful. Each tag is presented as a layer you have drawn.
Currently Drawter is available in Pro version, which means that it is intended for webmasters use only - knowledge of HTML and CSS is required. Drawter is not a tool for laymen, for the time being, but the whole team behind the project is putting every effort to launch a new version called "Amateur". Soon you will be able to draw your websites without any knowledge of HTML or CSS. Launching 2010.