a html to txt converter ( for converting bookmark favorite html exported files)
Can't you just rename the extensions?
a html visual editor(does one exist?)
You mean a WYSIWYG editor? There are many; for example, Netscape Composer is included with the Netscape browser. A list of some is on this page of the Google directory.
a "whats-the key code for the character I want" utility(does one exist?)
In Windows, the Character Map: Start » Programs » Accessories » System Tools » Character Map
After capturing the screen with the "Print Screen" key, the image can be pasted into any graphics program, so I don't see the need for a dedicated screen capture utility.
Fencer: The image with the id "rightarm" is supposed to be changed to the selected value from the drop down list, while the iframe (name="iframe") is supposed to be refreshed.