dubstep works with the pass password vault for Bash/GPG, and allows it to store two-factor authenticator credentials and generate one-time log-in codes.
It also includes a command-line QR code generator, in case you have use for such a thing.
synaesthesia adds colour tags to an incoming stream, by default around strings of hex. The idea is that you can compare hashes and signatures at a glance. It also has a setting to replace the hex with a string of emoji, which is easier to read out for confirmation (if you are both using the same settings).