SpaceECS (name subject to change)

Root.gd

extends Node2D

func _physics_process(delta):
	var vels = get_tree().get_nodes_in_group( "components/VelocityComponent" )
	for node in vels:
		var vel = ComponentServer.get_component( node, "VelocityComponent" )
		node.move_and_collide( vel.velocity * delta )
	
	var velsCS = get_tree().get_nodes_in_group( "components/VelocityCSComponent" )
	for node in velsCS:
		var vel = ComponentServer.get_component( node, "VelocityCSComponent" )
		node.move_and_collide( vel.Velocity * delta )
	

TestEntity.gd

extends Node2D

func _ready():
	var c := VelocityComponent.new()
	var dir := randf() * PI * 2
	c.velocity = Vector2( cos( dir ) * 100, sin( dir ) * 100 )
	ComponentServer.add_component( self, c )

TestEntityCS.cs

using Godot;
using System;

public class TestEntityCS : KinematicBody2D
{
	public override void _Ready()
	{
		float dir = GD.Randf() * Mathf.Pi * 2;
		ComponentServer.AddComponent( this, new VelocityCSComponent()
		{
			Velocity = new Vector2( Mathf.Cos( dir ) * 100, Mathf.Sin( dir ) * 100 )
		} );
	}
}

VelocityComponent.gd

extends Component
class_name VelocityComponent # Not necessary

export var velocity : Vector2 = Vector2( 0, 0 )

func _get_component_name(): # Is necessary
	return "VelocityComponent"

VelocityCSComponent.cs

using Godot;
using System;

public class VelocityCSComponent : Component
{
	[Export]
	public Vector2 Velocity = Vector2.Zero;

	public override string _GetComponentName()
	{
		return "VelocityCSComponent";
	}
}