Anagram Genius
Offers a searchable database of favorite anagrams, and a free Windows evaluation version of their anagram-generating software.
The Anagrammy Awards
Monthly competition searching for the best anagrams. Site offers a list of past winners, a submission and discussion forum, resources, and a hall of fame.
Anagrams.net
Hundreds of anagrams with different categories including celebrity names, sports, food, and movies.
Internet Anagram Server
Online anagram creator with various options. Includes 'The Anagram Times', Hall of Fame, FAQ and anagram trivia.