Chris F.A. Johson's WordFinder - Completes words with missing letters, finds word with the same beginning or end, and finds anagrams of words and common phrases. Also allows search by word and phrase length.
Crossinary - Crossword dictionary tool for download on a PC.
Crosskit.com - Includes a free online crossword dictionary for US style crosswords.
Crossword Dictionary - Searchable online puzzle solver. Contains more than 235,000 entries, including names and movie titles.
Crossword Helper - Partial word search with a separate proper name list.
Crossword Puzzle Guide - Lists of common crossword answers, biblical names and mythological figures organized by word length.
Crossword Solver - Online word and anagram finder that uses the UK Advanced Cryptics Dictionary.
Crossword Solver - A utility to help with those holes in solutions.
Crossword Star - Digital solving aid and dictionary available for purchase.
Crossword Tools - A web-based collection of crossword (and wordplay) related tools. Includes a crossword clue analyser, an anagram solver and generator and a letter pattern searcher.
Datrys - A word pattern searcher and anagram solver for Nokia Series 60 phones.