Download FT ImpactEffects Volume01 FREE Unity. 

Unity5 ready!
10 high-quality Impact effects.

This asset was previously using ParticlePlayground but it has been removed

Forum Thread
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Version1.0 released.
Version1.2 Made Shuriken particle system version.
Version1.3 Rename some object and prefab.
Version1.4 Add 10 ParticlePlayground effect.