PDF files are now available from GitHub; the following links are to be retired soon.
There are PDF books available in the pages linked to below. Presently, only Devanagari PDFs are available; PDFs in other languages will be available soon.
A book containing a large number of stotras (majority of the stotras present on this site). Includes Vishnu/Shiva Sahasranama Stotrams, as well as Saundarya Lahari.
A book with Bhagavad Gita dhyana shlokas, the eighteen chapters, Gita Mahatmyam from Varaha Puranam, as well as Yamunacharya's Gitartha sangraha.