These are my favourites, in no particular order:
Most of these offer markdown at their core and tend to go beyond simple notetaking capability, with the exception of Simplenote, which (as the name suggests) is a fairly straightforward notetaking app. Notable too, is focussed more toward note management.
Each of these have their own pros and cons, but still offer useful features you’re sure to appreciate going forward, depending on your needs.
Enjoy.
