nEOn Deluxe picks up where nEOn left off. It is a Cinema 4D plugin that allows you to create neon lights and tubing from your splines. Instantly. This is NOT A KIT. It's totally parametric and will work with any spline. nEOn Deluxe's features include:

Apply color to each neon tube individually.
Flicker animation with per tube control.
• Set Spline Type (Linear, Cubic, Akima, B-Spline or Bezier).
• Show/Hide Controls. Only see the controls you need. No clutter.
• 10 Preset neon lights.
• HUD Thumbnails.
• Clips and Insulators.
• Dynamic Cords and Connectors.
• Thumbnail icons for Presets.
• 3 Activations

You can find it at c4dphototools.com