The StotraSamhita organisation on GitHub is home to a few projects:
PDF Books of Various Stotras
PDF Books of Veda Mantras/Suktas/Kathaka/Aruna Prashna
PDF books of Srimad Bhagavad Gita
PDF books of Srimad Adhyatma Ramayanam, including Uttara Kandam
PDF books of Namavalis
Forked from shreevatsa/sanskrit/, the goal of this project is to implement a sort of proofreading assistant, to flag potential errors in encoded Sanskrit files.