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.

Meshroom 3D Reconstruction Software

The development team come with this infos about Meshroom 3D Reconstruction Software:
Meshroom is a free, open-source 3D Reconstruction Software based on the AliceVision framework.
The official website can be found here.

You can see a tutorial with Blender 3D - open-source software created by CG Geek:

VPaint software.

The development team of VPaint software come with this info:
VPaint was an experimental vector graphics editor based on the Vector Animation Complex (VAC), a technology developed by a collaboration of researchers at Inria and the University of British Columbia, featured at SIGGRAPH 2015.
You can use it with the following operating systems: Windows Vista, 7, 10, Max OS X and Linux.
I tested and is a good software with some important gaps for the user:

• you cannot copy frames;
• export is just for PNG and SVG file format;
• too few tools; 

The software can be improved and you can contribute here.

GIMP: extract still background and mask frames.

The issue is about BgMask: extract still background from video frames / mask frames against background , see Thread-extract-from-gif-with-BgMask-script.
The GIF file come from giphy.
I tested with the .scm script and working well with extract background and mask.
I have noticed that the differences are significantly positive when the background is static and the animation does not exceed the display area of ​​the GIF file, see the output result:
.

Online effects in a single image .

This website allows you to draw more effects in one image:

Krita 4.1.1 : Comics Manager tool.

This tool can be activated from the menu: Settings - Dockers - Comics Manager.
This start into the docker a GUI that allow you to use this tool.

Select a empty folder and give the info for your project:
It's a tool helps you create and export comics in a defined format.
Select all you need and use wizard to the end.
This will make all folders and config files.
You can open the project with same Comics Manager and the JSON file from your project folder.
The wizard will let now to use the buttons that until now were inactive: Project Settings, Add Page, Export Comic and Copy Location.