Architonic
Shown are three sections that showcase various elements of design. Product Catalogue: products for architecture and interior design. Design Museum: classic design from auction houses. Material Research: materials and consultation. Based in Zurich.
http://www.architonic.com/

Czech Design
Contains history of interiors in Czechoslovakia as well as current articles on the topic. List of designers with biographies, links to their sites and galleries. Also shown are competitions and exhibits. Presented in English and Italian as well as Czech.
http://www.czechdesign.cz/

Interioer
Weblog with the theme being the laymans view on interior design. Written in English the author is based in Stockholm.
http://interioer.blogspot.com/

Startpage Interior Design
Page of links related to interior design: designers, manufacturers, museums, online shops, news, and books.
http://home.hetnet.nl/~remcostenvert/

The New York Public Library: Interior Design
Catalog of holdings in the Art and Architecture Collection, including acquisitions from the original Astor, Tilden and Lenox collections, architectural source books, an antiquarian-based collection of portfolio and plate-books, and early design periodicals.
http://www.nypl.org/research/chss/spe/art/artarc/interior/interior.html

Way of Design, Interior Design from an Oriental Perspective
Online book by Filipino designer-author Jun Alday.
http://www.wayofdesign.com/ebook/