The text editor with
which the Angels in Heaven code C.
It is small, fast, and has hundreds of time-saving features. Best of all, it doesn't ship with
an annoying paper-clip that tries to tell you what to do.
vi has a steep learning curve
that keeps MS using morons far away, but there is a Wintel port
so that true Geeks
can feel at home if the must
be on an M$ box.