(Annie's Rhyme Time is a fun site where students can answer a riddle with a two word rhyme. http:/teacher.scholastic.com/annie/index.asp
Rhyming Picture Cards - see it and say it. http://www.kizclub.com/rhymes.html
Rhyme Zone has a rhyming dictionary and a Mother Goose feature to find your favorite rhymes. http://www.rhymezone.com/g/goose