ASCII Paint was made to help rogue-like developers.
Editor: ASCII-Paint is a simple, open source painting program which uses ASCII characters instead of Pixels to draw images. It was made to help Rogue-like developers, though it can be used by anyone.

Features:

GUI

* GUI based interface with tool tips
* Keyboard Shortcuts
* Slider/text based color chooser
* Full screen color chooser
* Symbol chooser
* Full screen support
* Hiding/Unhiding GUI (pressing TAB)
* MOVE mouse with keyboard (arrows and num pad)
* Image and solid view modes

Drawing

* Arbitrary sized canvases
* Draw single cells, lines, rectangles, ovals and text
* Holding shift draws straight lines/squares/ovals
* Flood filling
* Color picker
* Undo/redo
* Primary and secondary brushes

Rogue-like Tools

* Cells can be solid
* Field of view tool
* 4 FOV algorithms
* Path finding tool

File handling

* Opening and saving .asc files
* Opening and saving compressed files (files ending with a z)
* Importing text, foreground and background colors
* Exporting .png, .bmp, text, foreground and background colors

Configuration

* Configurable options (ascii-paint.cfg)
o Window size
o Full screen
o Window Background color
o FPS (frames per second)
o Font
o Canvas Size
o Initial brush properties
o GUI colors you can free download ASCII Paint 0.3 now.