Sanskrit can be downloaded freely from MUM.
Contains
A.Veda
Rigveda
Yajurveda
Samaveda
Atharva Veda
B.Shadanga of veda
Shiksha
Kalpa
Vyakarana
Jyothisha
Chand
Nirukthi
C.Shaddarshanas
NyanaVaisheshika
Samkhya
Vedantha
Karmameemamsa
Yoga
etc...etc..
D.Ayurveda
Kashyapa SamhithaBhela Samhitha
Haritha Samhitha
Charaka Samhitha
Susrutha Samhitha
Vagbhata samhitha
Bhava Prakasha
Madhava Nidana
Sharnghdhara Samhitha
E.Upanishad
F.Aranyak
G.Brahmana
D.Smrithi
F.Purana
G.Ithihasa