Alcor Rhyming Dictionaries - Online rhyming dictionaries in Spanish, French, Italian, Portuguese, Romanian, and German. - http://www.alcor.com.au/rhyming_dictionary.asp
Lexical FreeNet - Allows you to search for rhymes and relationships between words and concepts. - http://www.lexfn.com/
Rhymesaurus - [Windows 95, 98, ME, NT and 2000] Software. Free trial version available for download. Rhyming dictionary and other lexical tools. - http://www.purpleroom.com/software/
AnalogX - Rhyme - [Windows] A rhyming program. Knows over 100,000 words. It can rhyme words forward, backwards, and with matching syllable counts. - http://www.analogx.com/contents/download/audio/rhyme.htm
Semantic Rhyming Dictionary - Rhyming dictionary and thesaurus: rhymes, near rhymes, homophones synonyms, and semantic siblings of English words. - http://www.rhymezone.com/
Word Central - Student dictionary and rhyming dictionary online at Merriam-Webster's website. Daily Buzzword by subscription. - http://www.wordcentral.com/