Noisli : an inspired editor.

This publisher is recommended to writers and those who need inspiration.
I found him present in the community for those who want to write.
It's a simple online editor with dynamic graphics and sound effects.
Practically you can hear different sounds combined and you can let and choose color combinations to inspire you.
The editor can save in text format  and export to your dropbox account or Google Drive.
Here's a screenshot of this editor:

The Figma App Design Workflow - online tool.

The development team come with this intro:
Figma is the first interface design tool based in the browser, making it easier for teams to create software.
The Figma pricing start with:

• Basic - free for individuals 
• Professional - $12*
• Organization - $45*

You can start with your your email or google account, see first page:
The interface is simple and colors are great.
The official youtube channel come with many videos about this online tool.
You can find any references and tutorials on web.
The CharliMarieTV channel come with this title about Figma : Sketch vs Figma - Why I switched!

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:

New codepen example - modal window.

In user interface design for computer applications, a modal window is a graphical control element subordinate to an application's main window. It creates a mode that disables the main window, but keeps it visible with the modal window as a child window in front of it.
This is my example with a modal window created on codepen website.
The example is very simple.
The html5 source code is created with classes and id's.
The css file make all style for this tags.
The javascript use all of this to open the modal window, use click to close the window.
The Cancel and Add buttons not work with the java script.