23fbaf81_ess___Photographically_Curious__Mirrorless
[Overall] Image Stabilization [SLR] Nikon and Canon have no IS in the bodies. Not all their lenses have IS and if they do, they are quite expensive. Sony has IS in the bodies, so all lenses are stabilized. [Mirrorless] 
Panasonic and Fujifilm have IS in most lenses, Sony in some, Olympus has done it right and put IS in the body, so all lenses are stabilized. Smaller sensors and smaller lenses have the advantage of having to move smaller and lighter elements over shorter distances.
SLR vs. Mirrorless | Photographically Curious
Mirrorless