Spartacus.co.uk: Otto Dix
Provides detailed biography as well as several pictures.

Art For A Change: The Seven Deadly Sins
Provides a short explination about the painting.

Art for a Change: Der Krieg
Provides a short explination about the painting.

Dix's Thoughts on Art
Provides a quote of the artist's thoughts on his art.

Cornell University - Otto Dix
Features one of the Neue Sachlichkeit portraits - Woman Lying on a Leopard Skin (Liegende auf Leopardenfell), 1927.

Encyclopedia.com: Otto Dix
Provides a very brief biography.