The SCA_India Mailing List
SCA_India Links - Updated and maintained by the members of the SCA_India List
Indian Images at the SCA_India Gallery - A wealth of visual information

Indian National Science Academy - By requesting a login, it is possible to access their library of documents on a variety of historic and archaeological topics. I have found articles ranging from period dye techniques to hygiene. A truly fantastic resource.
Jstor.com - A repository of academic journals. A subscription is needed for access, however most libraries will have subscriptions.

Sanskrit, Tamil and Pahlavi Dictionaries
South Indian Inscriptions
Tamil Electronic Library - A simply exhaustive list of links and articles on various topics, from How to learn Tamil to more general history.
Conservation and Digitization of Rolled Palm Leaf Manuscripts in Nepal
Scriptures (Palm Leaves)
Development of policies for access, management and preservation of the Palm-leaf manuscript collection of the University of Peradeniya library (PDF)
Palm Leaves as Writing Material: History and Methods of Processing in Kerala (PDF)

Metropolitan Museum of Art
Los Angeles County Museum of Art
V & A Museum
British Library: Images Online
From Riches to Rags: Indian Block-Printed Textiles Traded to Egypt
Photographic feat: Thanjavur - "The inaccessible Chola murals at the Big Temple in Thanjavur have been captured in almost life-size photographs and displayed at the temple"

The Calico Museum of Textiles - Although the Calico Museum does not have its collections online, it is one of the premier museums of Indian textiles and has a variety of publications that are invaluable to those researching Indian textiles.
Government Museum Chennai