Lexique is a database that provides various information for 140,000 words in the French language. For example, it will give in particular the frequencies of occurrences in different corpora, the phonological representation, the associated lemmas, the number of syllables, the grammatical category, and many other information.
Openlexicon brings together several lexical databases, including the Lexicon database, but also other databases providing information such as age of acquisition, reading times or concreteness, for example.