Many of my favourite Les Mis sites have disappeared lately – if you know of a great one I’m missing, please let me know!
A really wonderful official site! Official Les Misérables site
The official site for the 2012 movie version: Les Misérables
The official site for the Prague production: Les Misérables – Bídníci
A great site dedicated to the New York show: Les Misérables – the unofficial Broadway production website
Great German site (also available in English): La barricade de l’Allemagne
Fan fiction of all kinds: The Les Miserables Fan Fiction Index
A directory of tons of Les Mis sites: Les Misérables Links Directory