As I’m sure you’re aware, a Wiki is a site which you can edit “as you go”.
This is a good example of a web page (HTML file) that you can put on your desktop and use as a notepad/scratchpad containing hyperlinks etc. It’s pretty good and could be used for making notes during test runs and could easily be saved off to a project folder or shared with colleagues.
You can download it from http://www.tiddlywiki.com/.
