Department of Official Language - Official site under the Ministry of home affairs covers the language act, language rules, departmental activities and related resources.
Dictionaries - A collection of freely downloadable dictionaries between several of the principal languages. From IIIT, Hyderabad.
Indian Language Alphabet Comparison Page - Eden Golshani's website - charts showing all the characters of the Devanagari, Punjabi, Bengali, and Gujarati syllabaries.
Language Journal - Monthly online journal devoted to the study of the languages spoken in the Indian sub-continent.
Languages Home - Learn to speak basics of 20 Indian languages in English, Bengali, Gujarati, Hindi, Kannada, Malayalam, Oriya, Tamil, Telugu language scripts.