nobleheart:

a good screen capture utility
For Windows or for Linux? Under Linux/KDE I can recommend ksnapshot.
Under Windoof? Print or Print+Alt to capture the specified Window.

a html to txt converter ( for converting bookmark favorite html exported files)
huh? What is exactly the problem?

a html visual editor(does one exist?)
NVU - klick here: http://www.nvu.com/