Free software

The list below is what I use or used. Most of them are free and full functional. Please add if you have some good tools.

from Peter

Screen recorder Flashback express
Notepad++
Microsoft Visual Studio 2019
Microsoft SQL Server developer edition
Microsoft SQL management studio easy tool to search inside files and replace stuff Grepwin
Postman though I more and more use Swagger as a component of the API project.
Seamonkey which is an easy html editor. It is also a browser, so when opening the browser you can find the editor in menu: window/composer.
Balsamiq this is a wireframe editor. We have a non profit license for it.
Microsoft Paint I use for screen shots.
Skype
Discord
Libre Office
Microsoft One Drive and Office online
Google Drive and Sheets
Salesforce. We have a 10 license account as a non profit.
Lucidchart is a limited free database diagram tool. I used it in the past.
github also on my mobile so I can quickly add some issue /idea
Whatsapp both webbased and mobile
Microsoft Teams (we have some none profit licenses for that) Azure (we can use for up to 400USD per month as a non profit) Zoom [Syncfusion.com](https://syncfusion.com0 as interface components
Inkscape which is a free alternative for Adobe Illustrator
Libre Office is a ebook management tool
Line chat program which is very popular in Asia. both windows and mobile.
eReader Prestigio is a mobile ereader good for ebup, mobi and pdf files

Paid software

Microsoft Windows
Microsoft Office
Adobe