sK1 - Home of the sK1 2.0 (ex.PrintDesign) vector graphics editor and UniConvertor
Playscii - Full-featured ASCII art and graphic editor and game creation tool
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
PabloDraw - PabloDraw is an Ansi/Ascii text and RIPscrip vector graphic art editor/viewer with multi-user capabilities.
Karbon - Karbon is the scalable vector drawing application in KDE.
REXPaint - REXPaint is a powerful and user-friendly ASCII art editor.