And allow me to introduce [link|http://www.getsoft.com/|Ed for Windows] Massively configurable, contains its own (C-like; no objects to confound...) scripting languages (much of the editor itself was written in this language), and about a quarter of the cost of CodeWright (which I consider to be the most overrated program of its genre.)

Alas, like the rest mentioned here, only for Windoze. (Been trying to get Neville to write it for Linux, but up to now, no luck...He's very Visual C-pus-pus oriented, and passed on the chance to write it in C++Builder.)