Upanyasam in Tamil by Vanamamalai Padmanabhan Swami https://srivaishnava.bandcamp.com/track/visleshaththil-piratti-vaibhavam-tamil
Sri Rangaraja Stavam Vyakhyanam
Book in Manipravalam by Thirumazhisai Annavappangar Swami http://acharya.org/bk/pb/taa/srrs-v.pdf
Dhruva Stuti
Stotram by DhruvaText in 9 Languages http://acharya.org/sloka/dhruva/ds-l.html
Biological Sciences in Ramayana
Talk in English by Selvi Shreya Srivatsan https://srivaishnava.bandcamp.com/album/biological-sciences-in-ramayana-english
Sri Vishnu Sahasranamam
Text in nine languages, broken up for easy chanting and the 1000 nama’s as defined by Parasara Bhattar, separated by commas. http://acharya.org/sloka/bheeshma/svsn-l.html