You're looking for information on CADWorx Plant Professional 2020 and possibly a free download. Here's what I found:

CADWorx Plant Professional is a popular software solution for plant design and piping engineering. It's part of the CADWorx suite, developed by Intergraph, a leading provider of engineering software solutions. The software is widely used in the process industry, including oil and gas, chemical, and power generation sectors.

If you're looking for a free trial or demo, I recommend visiting the official Hexagon website or contacting their support directly. They may offer a free trial or demo version of CADWorx Plant Professional 2020, which can give you a taste of the software's capabilities.

Be cautious when searching for free downloads of software, as they may not be legitimate or safe. Intergraph, now part of Hexagon, offers trials and demos of their software, but not free, full-featured downloads.