Here are 11 websites you might find useful as an author or publisher:
Loads.in — Find out how long it takes your website to load.
Pipl.com — A search engine for finding people. This can be useful when you are trying to track down people for testimonials, etc.
PrintWhatYouLike.com — Print precisely what you want from any webpage.
RadioReference.com — Listen to radio channels across the nation. Could be useful in book radio talk shows.
Readability-Score.com — Find out how readable your text is.
Rhymer.com — Online rhyming dictionary for the poet in all of us.
SearchTempest.com — Search all of CraigsList with one search.
WakerUpper.com — Send yourself a wake-up call so you get started writing early.
WooRank.com — Find out what your website is missing, how you can improve it, and how to make Google recognize it better.
WriteCheck.com — Correct grammar and check for plagiarism.
YouConvertIt.com — Convert documents into various formats. This can be very useful.