wordsmith.orglexicographic resources
Personal TarotDeal words to start a piece of writing
Manuscript FormattingSuggestions for formatting for submission - maybe of more use to novelists
Silva Rhetoricae: The Forest of RhetoricValuable and scholarly resource on this neglected subject.
Hybrid Studiosdirectories of artists etc
World Wide WordsMichael Quinion writes on international English from a British viewpoint
A Rhyming Dictionary for Poetry and Songwriting(probably will find a rhyme for purple, but has a broader definition of 'rhyme')
The Anagram Genius Server(anagram generator)
Research-It! - Your one-stop reference desk (Various reference tools)
Glossary of Poetic Terms from BOB'S BYWAY (useful glossary)
OneLook Dictionaries, The Faster Finder (Search several general and specialist dictionaries)
Dictionary.com (good online dictionary)
The Society of Authors(The Trades Union for UK Writers)
TRINPSITE VOCABULARY OF ALLITERATION(might be a useful reference)
Dictionary List(loads of them)
yourDictionary.com - Home Page(another impressive dictionary)
Slang DictionaryUK-oriented slang dictionary
WordcountTracking the way we use language
Acronym Finder
Ten Mistakes Writers Don't See (But Can Easily Fix When They Do)
Plain English Campaign (Laudable when they stick to what they do best, but embarrassing for their Golden Bull and Foot In Mouth awards.)
Word NavigatorSolve word puzzles
Language LogExcellent blog on linguistics