Superlinux is Rani Fayez Ahmad. A Palestinian living in Lebanon. He has Masters degree in Information Technologies from James Cook University of the Far North Queensland of Australia (year 2008). He has a B.Sc. in Computer Science from Arts and Sciences University of Beirut, Lebanon (year 2003). He worked for many I.T. firms and companies through out his career.
The main contribution that Rani makes to TCL/Tk is producing tutorial videos on YouTube. Click here to go to his YouTube channel (ranixlb). You should find the tutorial explained by Rani in Arabic and in English.
Also in July 2013 he made the Arabic language look properly in Tk. See the page Arabic Character Renderer For Readability In TCL/Tk