The MouseionDidache
1 work in the library, 1 with an English translation.
μῆνιν ἄειδε θεὰ Πηληϊάδεω Ἀχιλῆοςοὐλομένην, ἣ μυρίʼ Ἀχαιοῖς ἄλγεʼ ἔθηκε
A short buzz when you save a word, bookmark a passage or answer right, on phones that allow it (most Android phones; iPhones do not let websites vibrate).