Adobe RoboHelp is a classic help file production tool that features powerful functionality, intuitive UI and flexible layout. It enables users to easily and efficiently create a variety of attractive help documents, including: HTML help file (CHM), Website format of online help, PDF manual, Word document, etc. It was originally developed by Blue Sky Software in 1992, which was acquired by Macromedia in 2003. And Macromedia was also acquired by Adobe Systems in 2005.