ArchiCAD

ArchiCAD Webring :

- A list of ArchiCAD related sites.
ArchiRADAR :

- Resource site for ArchiCAD users, with GDL objects, and a mailing list. [more information in Italian language]
arkiKlub :

- A resource site for ArchiCAD users, including tutorials, tips and tricks, downloads, online support, and discussion forums for registered members.
GDL Alliance :

- An independent, international professional association consisting of GDL authors, software developers, and building product manufacturers.
Graphisoft R&D Zrt. :

- The developers of ArchiCAD, a 3D architectural design software with 2D drawing and layout functions for architects, interior designers and structural engineers.
Integrated CADD Services :

- Provides ArchiCAD based solutions for architects.