Generate particles from various shapes, including custom ones, a feature not native to After Effects Create particles using shapes like Ellipse, Rectangle, Star, Polygon, Triangle, Bar, and Custom Shape Customize particle size, shape, and direction. You can choose between a static size or random sizing Burst effect including exploding or imploding particles Fine-tune your setup using Effect Controls
https://aescripts.com/handy-particles/
Updates were made to improve the tool.