<p><strong style=color: rgba(128 128 128 1)>This special issue of Molecules is dedicated to Professor Julian Chojnowski on the occasion of his 85</strong><sup style=color: rgba(128 128 128 1)><strong>th</strong></sup><strong style=color: rgba(128 128 128 1)> birthday for his outstanding achievements in the field of organosilicon chemistry.</strong><span style=color: rgba(128 128 128 1)> </span><strong style=color: rgba(128 128 128 1)>This issue contains one review and eleven original articles written by eminent experts on various aspects of silicon polymer chemistry which reflect the tireless passion of Professor Chojnowski to the development of organosilicon chemistry.</strong></p>