Systema Vasiliev Elbow blocking and striking
Wing Chun Elbow Striking
The Keysi Method is based entirely around the defensive elbow:
(For a demonstration of blocking and striking in a circular motion click here)
Defence Lab : Shape 2
Defence lab is a split off of Keysi Method, but they have their own school and online teaching. Here is a look at their modified elbow defense shape:
Advanced Elbow Striking – Satria Arts
Satria Arts, are a Silat based style which uses elbows for striking.