Codapi an interactive code playground service.

Interactive code examples for all types of technical writing.

Embed executable code snippets directly into your product documentation, online course or blog post.

Supports 30 playgrounds out of the box, plus custom sandboxes if you need them.

You can run in-browser playgrounds without a server, use the Codapi cloud, or host a sandbox server yourself.

Read more on the official website.

CodePen : Home RoughJS and Wired elements example .

Clay Viewer : editor and export 3D files.

You can use this editor tool online.
Another option is to download the application on Windows and macOS with FBX/DAE/OBj import and glTF2.0/GLB export from here.
This tool comes with ClayGL library to provide a python tool for converting FBX to glTF 2.0.
The ClayGL is a WebGL graphics library for building scalable Web3D applications.
You can read more about this A.P.I. library here.
The source code can be found on GitHub webpage.
This is a screenshot with default clay-viewer tool:

Your 3D plants with ngPlant

ngPlant is a Free Software project and you can download it from here.
The ngPlant modeling tool and ngpshot utility are distributed under the terms of the GNU General Public License (GPL).
The great part of this softwarecome for developers.
They can use 3D API-independent library to use generated plant models in their 3D applications, or to create plant modeling plugins for different 3D modeling tools.
Also the software libraries (libngpcore, libngput and pywrapper) which may be used in another projects are distributed under the terms of the BSD License.