Apps for finding anagrams and other word searches

• Hoot (Word Study) by Dana Bell
• Word Expert (for Scrabble) by Pisanu Chaloemrattanaporn

Downloads

• Zyzzyva, a word study-program.
• Quackle, an open source crossword game for multiple operating systems.

Other resources

• Aerolith, a web-based word study tool.
• Woogles/a>, where you can play against people across the world.
• The Internet Scrabble Club, where you can play against people across the world.
• UnscrambleX, a website where you can find all valid words in any set of letters