Xenpaper
Xenpaper is a microtonal text based sequencer. It uses chords (4:5:6:7) (harmonic 7th), (number)ED(number) (2ED7), or Frequencies. (450hz).
Now We'll go into the pros, and cons of this sequencer.
PROS
You can easily create short tunes, and expirement in your web browser.
It's also easily accessible on school computers, so you can make songs anywhere!
CONS
It can't do harmony, and it only uses a muffled triangle wave.
It's also stuck in 4/4, unless you want a slow, but swingy feel.