Sanskrit
Sanskrit was considered as "Dev Bhasha", " Devavani "or the language of the Gods by ancient Indians. The word sanskrita, meaning "refined" or "purified," is the antonym of prakrita, meaning "natural," or "vulgar."
It is made up of the primordial sounds, and is developed systematically to include the natural progressions of sounds as created in the human mouth.
The ancient Indians attached a great deal of importance to sound, and hence their writing, poetry or prose, had a rhythmic and musical quality. Our modern languages of Indiaare children of Sanskrit, and to it owe most of their vocabulary and their forms of expressions. Sanskrit (meaning "cultured or refined"), the classical language of Hinduism, is the oldest and the most systematic language in the world. The vastness and the versatility, and power of expression can be appreciated by the fact that this language has 65 words to describe various forms of earth, 67 words for water, and over 250 words to describe rainfall.
The Sanskrit grammarians wished to construct a perfect language, which would belong to no one and thus belong to all, which would not develop but remain an ideal instrument of communication and culture for all peoples and all time.
http://sanskritdocuments.org/ - compilation of Sanskrit Documents in Devanagari display and audio
http://faculty.washington.edu/prem/mw/ai.html - Monier-Williams Sanskrit-English Dictionary
http://ignca.nic.in/sanskrit.htm - Gaudiya Grantha Mandira, Sanskrit Text Repository
http://www.sanskrit-lexicon.uni-koeln.de/scans/MWScan/tamil/index.html - Cologne Digital Sanskrit Lexicon, Sanskrit and Tamil Dictionaries
http://www.sanskrit-lexicon.uni-koeln.de/ - Cologne Digital Sanskrit Dictionaries
http://www.cs.colostate.edu/~malaiya/hindilinks.html - Hindi language resources
http://www.cs.colostate.edu/~malaiya/scripts.html - Language and scripts in India
http://www.jambudvipa.net/jambu.htm - Indology and related resources
http://sanskritmantra.com/ - Sanskrit mantras and spiritual powers
http://sanskrit.org/ - Development of Hinduism in the modern world
http://imp.lss.wisc.edu/~gbuhnema/homes.html - Sanskrit home study links (inc. online tutorials)
http://spokensanskrit.de/ - Sanskrit dictionary
http://www.samskrtam.org/ - Sanskrit academy - software for learning
http://www.wordgumbo.com/ie/ini/skt/index.htm - Sanskrit site (inc. Sanskrit-English lexicon)
http://www.angelfire.com/ma/vivekananda/sanscrit.html - Etymological study of Sanskrit
http://titus.fkidg1.uni-frankfurt.de/framee.htm?/texte/texte2.htm - Many Sanskrit texts (without translation)
http://sanskritdocuments.org/ - Sanskrit documents
http://www.sanskrit.nic.in/ - Rashtriya Sanskrit Sansthan is a premier Institution
http://www.americansanskrit.com/ - ASI offers simple powerful tools for learning Sanskrit