BoLS Boardgames - Scrabble New!
A Scrabble helper site with several online tools, including an anagram solver, a dictionary lookup, along with tutorials and rare word lists.

Hotspots Word Game
A word game similar to Scrabble and Yahoo! Literati, that will help you learn countless words. Numerous configuration options include letter frequency, tile values and board design.

Scrabble
Scrabble software by Handmark. Play Scrabble on your Palm OS handheld.