The webtoons webpage for your comics art.

You can share and publish your comics art using this website.
Just draw your work using your drawing software and upload it.
You can have multiple files with these specifications:
Recommended image size: 436x436;
The picture must be less than 500kb (JPG only);
The file name can only be in English letters and numbers.
I recorded one short video with this website like a short intro.
Happy drawing comics!

GrafX2 is a bitmap paint program

GrafX2 is a bitmap paint program inspired by the Amiga programs ​Deluxe Paint and Brilliance. Specialized in 256-color drawing, it includes a very large number of tools and effects that make it particularly suitable for pixel art, game graphics, and generally any detailed graphics painted with a mouse. The program is mostly developed on Haiku, Linux and Windows, but is also portable on many other platforms.
Main supported platforms are:

• Windows: 2.6 Installer / 2.6 Portable / Nightly build (latest changes, may be unstable) 
• Haiku: pkgman install grafx2 
• Mac OS: 2.6 for amd64 or PowerPC 
• Linux: Nightly builds

You can download it from the official website.
One good tutorial about how to create Blending and Transparency with this tool can be found here:
If you want to use for your game development then this is a good video tutorial about Tile Editing
issue:

The 3D photo creator online tool.

This tool named OmniVirt 3D Photo Creator is FREE to use and lets you create 3D photos.
This photos can be used on Facebook 360 or can be shared on the web:
STEP 1: upload the image;
Recommendation of this tool for the image file:
Recommended resolution: 3024 x 4032 px (or 4032 x 3024 px).
For maximum quality: 4032 x 4032 px.
STEP 2: upload or generate the depth map;
STEP 3: generate the 3D photo;
Read more at the official webpage.

The new Unity 3D version 2019.1 .

The new Unity version comes with many features, see the official website.
System Requirements for Unity version Unity 2019.1 are:
Released: 16 April 2019 
OS: Windows 7 SP1+, 8, 10, 64-bit versions only; macOS 10.12+ 
GPU: Graphics card with DX10 (shader model 4.0) capabilities. 
The official blog can be found here.