RSMB
Reel Smart Motion Blur or else known as RSMB is a plugin for Vegas Pro that adds motion blur to any video or visual element you add it to, there is also an option for it to use your GPU.
Buy it here
Resources
Vegasaur
Vegasaur Toolkit is a plugin for Vegas Pro that has tools to enhance the functionality of Vegas Pro, I personally really like their Tweener with many easing options which you can apply to your Pan/Crop keyframes.
Buy it here
Sapphire
Many effects, notably S_Shake
Buy it here
BCC
Many effects
Buy it here
Ignite Pro
Many effects
Buy it here [NOT AVALIABLE]