Spinnerchief does indeed a good job (although it has other flaws like crashing at startup occasionally)...and spinchimp (although i LIKE the interface!) gives a very weird list in his thesaurus, like the order of the synonyms is not as good as with spinnerchief. TBS i haven't used in ages, as said we do only MANUAL spins so we don't in fact need most features many spinner tools have today.
So What is Spin Rewriter? Spin Rewriter is a web based article spinning software developed by Alex Sustar, it is some sort of a paraphrasing tool specially made for article marketing to avoid plagiarism and at the same time, prevent being penalized by the Google search engine algorithm for duplicate content. If you have no idea about content spinning, it is a technique mostly used in search engine optimization where in you post a unique version of a relevant content on article directories, websites, or other sources of backlinks. Content spinning does not end there, some website authors also use this techniques to produce a rather unique content out of a single original content for their websites just as what I did before on my autoblogs. Moreover, articles that was put into content spinners are converted into spintax form, and an example of which is below: