The Vectorworks free trial is a of the software. It is not a limited "viewer" or a watered-down edition; you get access to all the tools and capabilities of the chosen product line (Architect, Landmark, Spotlight, Fundamentals, or Designer). The main limitation is that files created or saved in the trial are watermarked and cannot be used for commercial production without purchasing a license.
You can trial specific suites like Vectorworks Architect , Landmark, or Spotlight. How to Get Started