I’ve read your article it’s helpful so thank you. May I suggest you a couple more resources which could be useful for writers:

- free spell check tool. It can spell check on 25 languages and you can find there the free spell check widget for your site.
- free thesaurus. You can search there for synonymous, antonymous and definitions.
- one more thesaurus which creates word maps that blossom with meanings and branch to related word visual thesaurus.

Hope, this information is helpful.

Regards,
Mary