Recently the Skyrme model has been derived from string theory in the context of holographic QCD. Inspired by this work, I shall introduce a BPS Skyrme model derived from Yang-Mills theory. This explains and extends the construction of Skyrmions from the holonomy of Yang-Mills instantons, introduced some time ago by Atiyah and Manton

I shall discuss various solitons which are possible in a ferromagnetic medium. Examples include domain walls, magnetic bubbles, vortex rings and Hopf solitons.