Crossword Cracker
A fast puzzle solving program, which also has anagram and scrabble features, wordlist categories, and dictionary & thesaurus functions. Also includes German Language.

Four Star Word Study Software
Word study program for Windows computers which will help you to learn the most essential four-letter words. Developed by Will Cooper.

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.