Vashi Nedomansky, ACE offers 4k, 4k, 5k, 6k Aspect Ratio Free Templates at his blog.
https://vashivisuals.com/3k-4k-5k-6k-aspect-ratio-free-templates-premiere-and-after-effects
Motion Island has posted 5 free After Effects Chart Animations
MotionIsland has a blog post about 5 Free After Effects Chart Animations. These are very useful for commercial or coroporate graphics work. Check them out and download them and donate if you use them!
Motionworks After Effects CS6 3D material templates
MotionWorks has a template for After Effects 3D Materials and a tutorial for there use.