Text files without extension

[XPY]

Someone knows why some developers attach readme files without extensions to their programs? Why are they doing that? Is there any popular text editing tool which generates such files?

[the gaffer]

have a read here my friend it should clarify what you are asking http://en.wikipedia.org/wiki/Text_file

[Windows 98SE]

Most use readme files is how they name it, Simple notepad is the trick, Odd times there readme files in pdf format but most are just notepad then they rename it to readme.txt

[locustfurnace]

Also. many developers develop programs for various platforms. Such as for UNIX-like OS's. This would be for OSX, GNU/Linux and BSD.
Under these OS's. File extensions are not important to use. As the OS determines what a files type is without needing a dot 3 letter extension, by making use of meta-data.

[The Dude]

Indeed correct....

You can open a file with NOTEPAD even w/o an extention (You just have to do it manually)