StenEd theory
StenEd theory is a conflict-free theory created by the StenEd company. It is considered to be a longer, and more stroke intensive theory with a focus on writing words out phonetically to completion. However, it does have a few principles and briefs that allow for shorter and faster writing. StenEd is a widely taught professional theory.
The Plover theory, and by extension the lapwing theory, have the StenEd theory at their base. They have been modified to be shorter and/or more consistent in their rules.