One of the pleasures of building LEGO is to leave the safe harbour of guided instructions and build your own creations. Fans of LEGO usually refers to them as MOC or MOD depending if it is a creation of your own or if it is a modification of a LEGO set.
This is the list of models that I have built. Some of them has instructions and most of them comes with source code files ( talking about Mindstorms creations ). Hope you enjoy them as much as I did building and remember that if you have any question I am always there.
My Own LEGO Creations