Jesse Grosjean from Hog Bay Software has a new Mac outliner app called Bike. The idea is to make it as easy as possible to add and rearrange outline entries.
The documentation quotes Jonathan Edwards, “We were promised bicycles for the mind, but we got aircraft carriers instead”. That certainly is true for some productivity apps. Hog Bay Software has made some other great low-friction productivity apps in the past, like TaskPaper and WriteRoom. With my initial tests, Bike is right on brand with those apps. If you are looking for a fast, easy-to-use outliner, check out Bike.