How can i download Malayalam type writing software?

Malayalam characters are typed in Word-processors like PageMaker, Ms-Word, etc. using keyboard software pieces like Supersoft 'Thoolika' ISM, etc. When run, they will change the keyboard to Malayalam Keyboard. If you want Malayalam Unicode characters (They can be used in online texts), try to use software packages like 'Varamozhi Editor', 'BabelPad', etc. Search in google to get your desired package.