What resources help you unscramble letters to form words?

Tools are available at Anagram-Solver.net and Wordsmith.org for unscrambling letters to form words. In addition, Allen & Unwin Publishing offers a printed reference book titled "Anagram Solver" that is useful in solving anagrams.

An anagram is a puzzle in which letters need to be unscrambled to form a word. In an anagram puzzle, the subject of the anagram is the original word, while the scrambled word is the object. In a perfect anagram, the object uses every letter of the subject without any repetition or overlap of letters. Anagrams were popular during the Middle Ages, and most anagrams were presented in Latin.