Didieraccord.com: French grammar exercises to improve French vocabulary and learn grammar rules. On the theme of well-being. Includes exercises on French vocabulary, demonstrative pronouns, possessive pronouns, indefinite pronouns, and letter writing. With audio-files.
Orthogram.com: Downloadable tables of all the pronouns in French. Personal pronouns, possessive pronouns, demonstrative pronouns, relative pronouns, interrogative pronouns and indefinite pronouns.
Synapse-fr.com: Free online French grammar theory that explains the elements of the French language. Type of words in a sentence. Demonstrative pronouns.