Notepad++ is not available for Xfce but there are a few alternatives with similar functionality. The best Xfce alternative is SciTE, which is both free and Open Source. If that doesn't suit you, our users have ranked more than 100 alternatives to Notepad++ and four of them are available for Xfce so hopefully you can find a suitable replacement. Other interesting Xfce alternatives to Notepad++ are Mousepad, MadEdit and medit.
SciTE is a SCIntilla based Text Editor. Originally built to demonstrate Scintilla, it has grown to be a generally useful editor with facilities for building and running programs. It is best used for jobs with simple configurations - I use it for building test and demonstration...
A simple and hackable notepad.
A simple text editor for the Xfce desktop environment. Mousepad aims to be an easy-to-use and fast editor for quickly editing text files, not a development environment or an editor with a huge bunch of plugins.
It doesn't have many of Notepad++'s features. But for most of the basic functionality, it's a great alternative.
medit is a programming and around-programming text editor.
Started originally as a simple built-in editor component in GGAP, it grew up to a real text editor.
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A simpler version of Notepad++. Supports all the jazz you'll need: syntax higlighting, it's clever with Tabs, mass renaminc, etc. No macros though.