O Prabhus,
I came across this site. It belongs to Maharishi Mahesh Yogi (I know).
However, it has numerous texts in devanagari (for the translationkaris only) in .pdf format.
I found texts on Jyotish, Vyakaran, Puran, the Charak Samhita, and many more.
Samskrta Texts in Devanagari
Syama Biharini Radhe!