Ambiance Squared is a modification of the original Ambiance theme found in Ubuntu. This version has sharp edges and other modifications.
I should also note that this is still in development.
Dark Sidebar as seen here (goo.gl/AbZVq with credit to WarriorIng64)
Borderless windows as seen here (goo.gl/EnIam with credit to user ~simplygreat)
Square Windows Edges and Dialogues (See Preview)
Extract the compressed theme to /home/*USERNAME*/.themes
As always replace *USERNAME* with the name of your home folder
Comments are always welcome!