A Simple 3D viewing Solution
If you need a quick and easy solution to view 3D models, this tool will do the job. If you need to add files in or merge them, you will need a paid version, but for viewing models you can use the free version.
Navisworks is very easy to use and to learn. Even with the free version, you can still gather information from the model. Whether you are looking for measurements or product data, the data is there.
The free version cannot append new files. When using manage, the clash detection system can be quite confusing and time-consuming to generate a clean list of clashes.