Kuuvik Capture is an advanced tethering software for use with Canon cameras (most models supported). Created by 3 Hungarian nature and landscape photographers, the software has many advanced features aimed at helping professional photographers get the sharpest image in the most effective way.
Kuuvik Capture also has some interesting built in features such as Exposure Sequence Automation (for HDR time-lapse, etc.), split view, focus stacking and more.
The price of the software is between $80 and $100 depending on the exact Canon camera model you have.
Optimizing Focus with Kuuvik Capture
Optimizing Depth of Field Using Tilt/Shift Lenses