How are you?
In this list I bring you a variety of alternative software to those from Microsoft, and also that these free and open source programs
So enjoy this list!
(I will be updating it every day)
Free open-source code editor and Notepad replacement supporting multiple languages, featuring high speed, low resource usage, privacy focus, and plugin extensibility.
This repository contains a build file to generate FLOSS release binaries of Microsoft's Visual Studio Code - Open Source ("Code - OSS") project, the open source core of the proprietary 
Visual Studio Code.
The Kate project develops two main products: KatePart, the advanced editor component which is used in numerous KDE applications requiring a text editing component, and Kate, a MDI text editor application.
Extensible text editor with UTF-8 support, syntax highlighting for many languages, remote file editing, customizable interface, and plugin integration.
GNU Emacs is an extensible, customizable text editor—and more. At its core is an interpreter for Emacs Lisp, a dialect of the Lisp programming language with extensions to support text editing. The features of GNU Emacs include:
Geany is a powerful, stable and lightweight programmer's text editor that provides tons of useful features without bogging down your workflow.
A cross-platform, reimplementation of Notepad++. Releases are available for Windows, Linux, and macOS.
FeatherPad (by Pedram Pourang, a.k.a. Tsu Jan tsujan2000@gmail.com) is a lightweight Qt plain-text editor for Linux. It is independent of any desktop environment and has:
Linux PowerToys brings a set of utilities to tune and streamline Linux experience for greater productivity.
Browse, search and edit worldwide map data for roads, paths, places, buildings and natural features, then reuse it under an open data licence.
Offers a Google Maps–style interface with clickable OpenStreetMap points, editing tools, vector maps with 3D tilting, public transport data, and mobile PWA support.
Privacy-focused GPS app with offline maps and community development, featuring real-time navigation, no location tracking, and open-source software.
CoMaps is a new community-driven map app project born out of the desire to create a truly open, transparent, and community-focused navigation app.
Navigation app with offline and online OSM maps, turn-by-turn voice guidance, cycling and driving modes, GPX tracking, POI search, and monthly updates.
quickly find the place you’re looking for by searching for a city or street, or locate a place to meet a friend.
Alternative front-end for 
Google Translate, serving as a Free and Open Source translator with over a hundred languages available
Free and Open Source Translation API. 100% self-hosted, no limits, no ties to proprietary services. Built on top of Argos Translate.
Open source virtualization tool supporting x86/AMD64, runs on Windows, Linux, Mac, Solaris. Offers portable, lightweight, ad-free use.
Open-source hypervisor emulating CPUs via dynamic translation. Supports unmodified guest OS, allows mixed binary translation and native execution.
A simple GNOME application to access virtual systems. It is based on a design from Jon McCann and Jakub Steiner.
Threaded group chat with topics for live or async collaboration, open-source, supporting self-hosted or cloud use, suited for organized team discussions.
A secure collaboration app with end-to-end encryption and interoperability across web, desktop, and mobile. Includes chat, voice, and video calls.
It is the brand new, and fastest ever, Matrix client. It is for personal and community use, and will support enterprise functionality later this year.
User-friendly messaging platform with end-to-end encrypted chats, voice and video calls, self-deleting messages, file sharing features, and customizable interface.
Free, open-source conferencing with end-to-end encryption, group chat, screen sharing, Etherpad integration, customizable setup, and privacy by default.
Self-hosted platform for chat, workflow automation, voice calls, screen sharing, AI-powered features, third-party integrations, and team messaging.
Privacy-focused video meetings with unlimited participants, secure AES-256 encryption, no data sale or registration, hosted in Switzerland and powered by renewable energy.
Free, open-source, local-first task manager and time tracker for desktop, web, Android and iOS, with Pomodoro focus and optional self-hosted sync.
Intuitive multi-track video editor with robust hardware-accelerated support; offers chroma key, color grading, and extensive audio/video format compatibility.
Free, open-source video editing with multi-format timelines, frame accurate seeking, and robust capture support up to 4k for diverse projects.
Free, open-source video editor featuring cross-platform support, unlimited tracks, trim and slice tools, 3D animated titles, and video effects for editing projects.
Free video editor with a beautiful and intuitive user interface, a clean codebase and a fantastic community.
A free, open-source painting program for professional artists offering customizable UI, 9 brush engines, layer support, and color management.
KolourPaint is a simple painting program to quickly create raster images. It is useful as a touch-up tool and for simple image editing tasks.
Pinta is a image editing, drawing and painting application with a simple yet powerful interface. Pinta has a wide range of drawing tools, including: freehand, rectangles, circles and lines. It also has over 35 effects to apply to your images, and also has the ability to create...
MyPaint is a fast, distraction-free, and easy painting tool for digital artists. It supports graphics tablets made by Wacom, and many similar devices.
Raster & vector graphic editor with many tools and filters, written in Lazarus. Portable, 32bit & 64bit versions, ORA format & 16384x16384 image support. In app 3D import & rendering.
Introducing Fossify Keyboard – your go-to solution for effortless and efficient typing. Experience a seamless typing experience designed to cater to all your needs, whether chatting with friends or inserting texts, numbers, or symbols.
We are building a modern keyboard that respects your privacy and security. 100% offline and 100% private, the FUTO Keyboard is equipped with all of your favorite features including but not limited to swipe typing, offline voice input, smart autocorrect, theme selection, and...
Comments
This list needs to be updated
To be fair, as soon as you make a list like this, it needs to be updated
An inspiring list, AxelFOSS! I moved away from Microsoft when they were forcing the move from Win 7 to 10! Faced a lot of challenges, ngl. But then no different from in MS ecosystem.
And because of my own experience, I do disagree with a lot of your choices. But looking at your list has inspired me to make one of my own. Thanks.
FOSS needs as many evangelists onboard as possible.
Just to tell you, I've had bad experiences installing LibreOffice and OpenOffice onto a mobile hard drive.
For Teams I would suggest:
Zulip , 
Mattermost and 
Infomaniak kChat