Have anyone used the Touchdesigner 3D software? It looks good

Yes, I use it for live performance.
It's very simple to use if you follow the basic tutorials. However for more advanced things, you'll need programming experience.

That's ... really about it.

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You tell that you use it for live perfomance, and this is the impression I have that it really from the description and example, is more for making show and live presentations than a real design software 2D for making artworks

Well the program's capability extends to producing stills as well, so you can write out 2D stills if you want to, just like you could with AfterEffects. So the intention of the program maybe for performance, but it's usage is for anything you want it to be. It's a programmable environment in that sense as well.

If you want you can make yourself a little painting program and make a trigger-able write-node that exports high res jpegs or something so you can have your audience paint, press a button, and print results out on the spot. It's very powerful and flexible in that sense.

It also shares the same node-structure philosophy as Houdini, so a lot of what you know in Houdini is translatable in TouchDesigner to some degree.

But again, this is technically a performance program with a lot of customization capabilities.