The LibreCAD open-source CAD application.

The development team tell us about this software:
  LibreCAD is a free Open Source CAD application for Windows, Apple and Linux. Support and documentation is free from our large, dedicated community of users, contributors and developers. 
... 
LibreCAD (originally CADuntu) is a free and open-source 2D CAD application, which uses Qt (a cross-platform application framework). The project started around 2010 as a fork of QCAD 2.0.5.0.
The official blog can be read here.
This software can be used on Windows, Linux and macOS, take a look here.
This is a screenshot with this software:

News: Krita 4.0.2 released.

The Krita development team come with this news:

  Today the Krita team releases Krita 4.0.2, a bug fix release of Krita 4.0.0. We fixed more than fifty bugs since the Krita 4.0.0 release! See below for the full list of fixed isses. We’ve also got fixes submitted by two new contributors: Emmet O’Neil and Seoras Macdonald. Welcome! 

Please note that: 

•  The reference image docker has been removed. Krita 4.1.0 will have a new reference images tool. You can test the code-in-progress by downloading the nightly builds for Windows and Linux. You can also use Antoine Roux’s reference images docker python plugin. 
• Translations are broken in various ways. On Linux everything should work. On Windows, you might have to select your language as an extra override language in the Settings/Select language dialog. This might also be the case on macOS 
• The macOS binaries are now signed, but do not have G’Mic and do not have Python scripting. 

The full article can be found here.

Blender 3D - EasyFX addon .

About this addon you can read and download it from here :
This addon come with this intro:
This is a free add-on for Blender which allows you to do post-production directly from the image editor, and EasyFX will automatically build your composition node tree.

• Automatically builds your composition node-tree
• Beginner friendly
• Advanced users have the possibility to continue working on the generated node tree
• Create stunning looking renders and animations!

Take a look to see how is working :

Unity3D : The Obi 3.4

This new release come with this news and features:
Obi is the first CPU-based real time unified physics framework:

• Unified framework for character and interactive cloth, fluids, ropes...
• Advanced editor tools
• High performance multithreaded solver
• Two-way interaction with rigidbodies, supports all collider types
• From low budget, simple effects to extremely complex behavior

The main goal of this release is focuses on rendering particles and fluids.
The youtube channel can be found here.
You can see into the next video the good start of this asset into cloth simulations :

The Tinkercad with 3D features.

This website come with this features:
Tinkercad is a simple, online 3D design and 3D printing app for everyone.
The development team try to help:

• designers;
• hobbyists;
• teachers and kids
• to make toys
• prototypes
• home decor
• Minecraft models
• jewelry 
• ... the list is truly endless!

Take a look at this intro from official youtube channel :

The online tool for diagrams.

With this online tool you can start making flowcharts, charts , many type of diagrams and much more.
The goal of this tool is the online integrated features for diagrams with flexible share options.
You can try draw.io online tool for free and save your diagrams to Google drive , OneDrive or Device.
You can start by select your default diagram area from this list of option and create new diagrams:

• Basic (1)
• Business (11)
• Charts (3)
• Engineering (3)
• Flowcharts (5)
• Layout (3)
• Maps (2)
• Network (18)
• Other (7)
• Software (8)
• Tables (4)
• UML (8)
• Venn (7)

This is the official youtube channel.
Take a look at this quick start video tutorial for a first impression :