FFRender Free allows the user to render 8-bit H.264 at the layer level using an external FFMpeg installation. All known AE renderers render at the level of a composition. The commercial FFRender Effect provides more options.
FFRender Free is offered for free, without any need for registration.
FFRender Free provides 8-bit H.264 render options from FFRender. See FFRender docs for usage instructions.