[bocklund]

Here are some that I would say cater to power users and are flexible and high quality

* OmniFocus and anything from Omni Group

* Alfred

* Keyboard Maestro

* Drafts

* iStat Menus

* Soulver

* BBEdit

* Hazel

* Marked

* MindNode

and tons more that I have not personally used or found useful.

[hoistbypetard]

It's probably also worth noting that BBEdit has been around since the early 1990s and has weathered several transitions.