If you are looking for professional design tools without the heavy overhead or high cost of a full subscription, consider these modern alternatives:

A one-time purchase software that is faster and more modern than CS6.

If you'd like to compare the or need a guide on how to move files from CS6 to newer software, I can help with that.

While the idea of a "free" or "lightweight" InDesign sounds appealing, using a portable version comes with severe downsides:

Because the software isn't properly installed, it often crashes during resource-heavy tasks like exporting high-quality PDFs or handling large image links.

Allows users to "grab" objects from one layout and place them in another, maintaining a link between them.