Free Software for Windows
Paint.NET
Paint.NET is a free image editing software for Windows. It's fully-featured, and has an intuitive interface that streamlines creative workflows. With Paint.NET, professionals and hobyists alike can create fantastic art work.
QGIS
QGIS is a free and open-source software that can be used access planetary imagery and geospatial data. The platform is openly developed and released under the GNU GPLv2. With QGIS, users can view, edit and analyse geospatial data cross-platform, for Android, macOS, Linux and Windows.
ShareX
ShareX is a free and open-source screenshot and screencast utility. The software lets you capture or record any area of your screen and share it with a single press of a key. ShareX also integrate well with popular online services and allows you to upload and publish images, text or other types of files. ShareX is avalible for free on Microsoft Windows.
Thunderbird
A free an open-source email client developed openly by the Mozilla Foundation and the community. Thunderbird is easy to setup and customize and supports POP and IMAP. The email client comes with all features needed to search, filter, write and manage emails, but also have builtin support for live chat between contact and RSS/Atom feed reader.
Node.js
Node.js is a free and open-source JavaScript runtime environment built on the V8 engine. Node.js can execute JavaScript outside of a web browse and works cross-platform. The platform is used to power many JavaScript software project and web application in production today. Node.js is perfect for data-intensive real-time applications due to its event-driven and non-block I/O model.
FlexGet
FlexGet is a free and open-source multipurpose automation tool for all of your media with support for torrents, nzbs, podcasts, comics, TV, movies, RSS, HTML, CSV, and more.
Flameshot
Flameshot is a free and open source screenshot software that is powerful and intuitive. It uses a DBus interface that allows you effectively take screen shots, and make in-app screenshot editions, and also upload images directly to third-party services like Imgur.
Irssi
Irssi is a terminal based IRC client for UNIX-based operating systems. Irssi comes with IRC built-in and is multi-protocol friendly for module authors, it also support integration with SILC and ICB protocols via plugins. The application easily integrates with your window manager, your terminal emulator, your remote connection, your terminal multiplexer, your IRC bouncer and your IRC adapter. Allowing you to use Irssi virtually everywher throughout your system. Irssi is free software licensed under the GPLv2, available for macOS, Linux, BSD, Solaris, and Cygwin.
Total Commander
Total Commander is an Orthodox File Manager (OFM) for Windows. With Total Commander you can organize files and quick and easy navigate through your folder structure. It features an built-in FTP client, and tools for file comparison, archived files navigation and multi file renaming with regular expression.