You can download some effects from the trailer here.
Features: - Create every effect in a graphical editor, no coding, no YAML editing - Create 3D models with animations and deformable mesh - Morph one shape into another - Detect player collisions with particles - MythicMobs integration - and lots of other features... DEMO version is limited to one effect playing at a time. You can buy the premium version here.
This plugin uses and requires Unity (free) to create particle effects.