Lucas' Pure3D Editor is a tool for opening Pure3D (.p3d) files found in various games created by Radical Entertainment.
The tool is primarily geared towards loading Pure3D files and chunks for The Simpsons: Hit & Run with only partial support for chunk types found in other games.
This tool is available from the Donut Team downloads page.
This add-on is available from the Donut Team downloads page.
As of Version 1.1.3, the addon is supported in Blender versions 2.63 through 2.82.
Prior to this version of the addon, you had to use an unofficial port in order to be able to use it Blender 2.80 or newer.
See this page for the editor itself.
See this page for the Model XML Blender Add-on.