This is the built-in app store inside SketchUp. It is 100% free and virus-free.

Once you have downloaded the .rbz file from the link above, follow these steps to install it: Open your version of .

Browse your computer to find the downloaded file. Select the file and click Open .

: Choose between stacked slices (solid layers) or interlocking slices (egg-crate grid structures).

Once installed for free: