ASCII art is very popular on the web. The text-based drawing of diagrams are quite amusing. Actually drawing these diagrams in ASCII with a notepad would be very tedious.
Not to worry, ASCII Flow is a nice online tool, that geeks will love.
Just lookup ASCII Flow and start drawing free hand a diagram. There are various options which include saving the diagram and embedding it with HTML code.
This website was created by a Google Adsense Engineer Lewis Hemes. In the future, it is expected to have a gallery of the ASCII art saved on the website.
In the case you only want a quite ASCII generator of text you insert, then try ASCII Generator.
So go ahead and try out these tools, feed the geek in you and drop in your comments.