Shear Force and Bending Moment Diagrams: This is a good website, provides a great deal of explanation for the formulation of equations. Displays the diagrams that correspond to the different loads and forces; this allows you to select the most appropriate equation. It also explains shearing force and bending moments.
Shear Force and Bending Moment Diagrams: This website is useful because it explains point loads and point moments. It also explains step by step equilibrium moments and forces, and it gives you a brief example of them and how to derive/draw shear forces and bending moment diagrams.
Shear Force and Bending Moment diagrams: This site provides a great list of variables for the mechanical equations. It shows the shear force moment relationship but is not as helpful as some other websites because it lacks the visual representations that relate to the different loads and forces.