QTikZ is a fabulous little editor that allows you to enter TikZ code and see a real-time preview of your figure. It was available for download for MS Windows at
http://www.hackenberger.at/blog/ktikz-editor-for-the-tikz-language/
but that website now appears to be down. Does anybody know (a) what has become of the QTikZ project, and (b) whether there is an alternative place to obtain a copy of QTikZ for Windows?