With something as visually exciting and creative as the SVG filters, just listing them seems a shame, but I start this section by doing that. Strictly speaking, this list shows the filter primitives available in SVG:
feBlend feColorMatrix feComponentTransfer feComposite feConvolveMatrix feDiffuseLighting feDisplacementMap feFlood feGaussianBlur feImage feMerge feMorphology feOffset feSpecularLighting feTile feTurbulence
These filter primitives can be used singly or in combination. Used singly, they can sometimes produce useful effects, but when they are used in combination, some unusual and visually arresting effects are possible.
I encourage you to experiment with using the filter primitives singly, applying them ...