Zeus is a programmer's TextEditor designed for Windows developers.
Some of Zeus's features:
A free shareware version is available.
What are some of its strengths and weaknesses vs, say, CodeWright, UltraEdit, Emacs, and Vim?
Here is how I would compare Zeus to these editors:
Is there a way to hide all the lines that start with more than a specified number of tabs?
Yes and no. Zeus does have the ability to select and hide lines of code into a fold point.