Joris Gillis wrote:

demands are:

* Lightweight, tiny, fast code editor.
* Very simple UI.
   ** No tree views, no grid views, no mapping views, no floating
toolbars...
   ** Just a screen were I can see the pointy brackets.
* Very basic functionality (line count, syntax highlighting, tag
completion - adapted for XSLT)
   ** No XSLT processing functions, no debugging, no Xpath/Xquery
testing
* Able to detect file changes
* Not written in Java
* My budget: 0 cents. (preferably open source)

if u are commandline orientated GNU emacs or Xemacs with nXML mode is a
winner everytime.

if its windows...I found using TextPad and PFE useful, Textpad has
useful plugin xml modules

if its mac osx AquaEmacs is a good option