This plugin is a combination of particle system and slate, supports sprite and ribbon data type. You can use most of the modules of particle system, they'll be rendered directly in Slate without render target.
Just edit a particle system in Cascade Particle Editor, choose a UI material, then put it on UI in UMG Editor.
Number of Blueprints: 0
Number of C++ Classes: 5
Network Replicated: No
Supported Development Platforms: Win32, Win64, Mac
Supported Target Build Platforms: Win32, Win64, Android, Mac, iOS
Example Project: https://github.com/adolfans/uiparticlesamples
This example repository contains two projects: one for UE4.18 and one for UE4.24. There are also some example assets under the plugin content directory.
Tutorial Video: https://youtu.be/yPo1orJPe2Q