Features:
- FreeBASIC syntax highlighting
- cross-platform
- visual designer (emitting XML, wx-c, fltk-c, ...)
- plugin system
- multi compiler support
- autoformat code while typing it
- block comment and uncomment
- indentation guides
- multilingual
- customisable
- compiles and runs code from within the editor
- tabbed
- ...
Screenshot on Win7 (click to enhance):

Here a early video of the usage on Ubuntu 12.04 VM:
Video
This video shows the designer using wx-c emitter on Windows 7:
Video
This video shows the designer using fltk emitter on Windows 7:
Video
More information and downloads:
wxFBE at FreeBASIC-Portal.de