The Gītā with Madhusūdana Sarasvatī's Gūḍhārthadīpikā, everything clickable. Every word of the verses and of the commentary opens its sandhi-split, grammar and meaning; every paragraph of commentary carries an English and a বাংলা translation. देवनागरी / বাংলা changes script throughout, popups included. Words with a dotted underline were dropped by the reading edition and restored from a second witness (hover to see which).

Typing Sanskrit: the A button by the search box turns on typing in the script the page is showing — A ⇄ अ in Devanāgarī, A ⇄ অ in Bengali. A bare consonant carries its own a, so yog gives योग / যোগ; a comma is the halant, so dhr,m gives धर्म / ধর্ম. The ⌃ button hides this whole bar; on a phone it also slides away as you scroll down.