Standard snaps let you snap to mesh and shape objects, as well as to the active grid.
Non-grid snap types, when active, take priority over Grid Points and Grid Lines snaps: if the mouse is equally near a grid point and some other snap type, it will choose the other snap type.
Snaps to grid intersections. This snap type is on by default. Keyboard shortcut=+F5.
Snaps to any point on a grid line.
Snaps to pivot points of objects. Keyboard shortcut=+F6.
Snaps to one of the eight corners of an object's bounding box.
Snaps to the perpendicular point on a spline, relative to the previous point.
Snaps to a tangent point on a spline, relative to the previous point.
Snaps to vertices of mesh objects or objects that can be converted to editable meshes. Snaps to segments on splines. Keyboard shortcut=+F7.
Snaps to the end points of edges on meshes or spline vertices. Keyboard shortcut=+F8
Snaps anywhere along edges (visible or invisible) or spline segments. Keyboard shortcut=+F10.
Snaps to the middle of edges on meshes and spline segments. Keyboard shortcut=+F9.
Snaps anywhere on the surface of a face. Back faces are culled, so they have no effect. Keyboard shortcut=+F11.
Snaps to the center of triangular faces.