To be continued from the previous articles, I would like to introduce you a free application for Android named Learn Ruby. As you know Ruby tutorial is a scripting language designed by Yukihiro Matsumoto, also known as Matz. It runs on a variety of platforms, such as Windows, Mac OS, and the various versions of UNIX. This application gives a complete understanding on Ruby.Beside there are a lot of other free Android application waiting for you to discover such as Learn SEO Techniques, Learn Social Media Marketing, OpenOffice Writer, ............. . Wish you success and luck!