Mantras

Visible Mantra : http://www.visiblemantra.org

Mantras & Dharanis in Siddham Calligraphy

Prapatti : http://www.prapatti.com

A huge resource for Vaishnava Mantras in various Indian scripts. Infact, it has all the Vaishnava Mantra collection accompanied with the Superb Audio Reciataion

Dharani Sangraha : http://www.dharanisangraha.com

Dharanis from Nepalese Tradition in Devanagari & Roman

Jain Mantras : http://www.terapanth.com/popular_mantra.htm

A comprehensive compilation of various Jaina Mantras. But the Mantras are present as Devanagari images files, rather than plain text. Interestingly the collection also includes Prakrit Texts.(Probably Ardha Magadhi)

Sutras Mantras : http://www.sutrasmantras.info/mantra0.html

Collection of various Dharanis and Mantras

Dharani Pitaka : http://www.dharanipitaka.net/

Contains a huge amount of Various Mantras, Dharanis and Vidyas. The interface is in Chinese however, but can be browsed using Google Site Translator. The Texts are available in Roman as PDF files

Siddham Sanskrit : http://www.siddham-sanskrit.com/

A huge resource for Mantras/Dharanis in Siddham Calligraphy. It has plain text versions too in Roman Script. Again, the interface is in Chinese, you gotta use a Site Translator to browse through

Dharma Sound : http://www.dharmasound.net/?type=files&paths=Chanting

Collection of various Audio Recitation of Mantras & Sutras in Sanskrit & Chinese

Tantra

A great blog on Tantra (with a huge bias towards the Astika Tantra :-) ), Evolution and more !.

Writing Systems

Omniglot : http://www.omniglot.com/

A absolutely great sites with tons of information about various orthographies

Mattong: http://mattong.wordpress.com/

Information on Mantras & Various Dharanis in Script such as Siddham & Ranjana

Ancient Scripts : http://www.ancientscripts.com/

A site similar to Omniglot with information about various scripts.

Grantha Google Group : http://groups.google.com/group/grantha-lipi

Google group dedicated to the discussion of Grantha Lipi

Indoskript : http://userpage.fu-berlin.de/~falk/

Cool Epigraphical Software  

Unicode

Ishida Unicode Convetor : http://rishida.net/tools/conversion/

Ishida's Unicode convertor to convert Unicode text to various formats.

Ishida Uniview : http://rishida.net/scripts/uniview/

A handy Unicode text analyzer

Tamil

Noolaham Digital Library : http://www.noolaham.org

Noolaham Tamil Digital Library, has a huge collection of Tamil Books

Tamil Heritage Foundation : http://www.tamilheritage.org/

Tamil Heritage Foundation has a eBook section with rare eBooks and other materials pertaining to Indian Culture

MinTamil Google Group : http://groups.google.com/group/mintamil

A scholarly discussion forum in Tamil. Actually, one of the most sane Tamil discussion lists around the block (The others are usually infested with linguistic

fanatics :-( )

Sanskrit

Sanskrit Reader : http://sanskrit.inria.fr/DICO/grammar.html

A handy application to play and learn Sanskrit.

Sanskrit Tripitaka : http://www.uwest.edu/sanskritcanon/dp/

University of West - Sanskrit Tripitaka inlcludes Stotras and Shastras

Sanskrit Documents : http://www.sanskritdocuments.org/

Various Sanskrit documents including Stotras,Mantras,Itihasas and other stuff