ArchINFORM: International architectural database with projects and images of the movement.
ArtLex on De Stijl: Defined with images of examples from throughout history, quotations, and links to other resources.
De Stijl Font Set: This set of 4 fonts is inspired by the geometric forms of the Dutch movement.
The ArtFile: The Style: An alliance of Dutch artists, its leaders, the purpose, and the principals.
Visual Artists at 1001.org: Short biographies and pictures of the artists.