Open Source OS & Utility Software
MultiBootUSB
MultiBootUSB is a cross platform software that allows you to install multiple live linux on a USB disk non destructively and option to uninstall distros. MultiBootUSB is written in Python and is released as free and open-source software under the GPL-2.0 License.
KDE Plasma
KDE Plasma is a free and open-source graphical workspaces environment built Linux systems. You can use KDE Plasma to suf the web, keep in touch with colleagues, friends and family, manage your files, enjoy music and videos, and get creative and productive at work. KDE Plasma is built using Qt and KDE Frameworks and supports HiDPI displays and ships a highly convergable graphical shell.
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.
PureOS
PureOS is a fully audit-able operating system developed and maintained by the privacy-focused Linux device manufacturer Purism. With PureOS you can rest assured that your privacy is taken seriously. The operating system has been independently verifiable by security experts and software developers around the world and is developed and released as a free and open source operating system. Under the hood, PureOS uses the popular GNOME desktop environment which is loved by many in the Linux community for its polish and long standing project commitment.
Snap Store
Snap Store is app store for Linux-based operating systems, used by millions of people across 41 distributions. At Snap Store you can easily find and install new applications or remove existing installed applications on your system. Snap Store provides free and open source software that can be bundled by anyone.
USBImager
A really simple open-source, GUI application that writes compressed disk images to USB drives and creates backups. USBImager is avalible for Linux, macOS, and Windows.
GNOME
GNOME, also known as GNOME Shell is a graphical user interface for Linux-powered computers. GNOME provides an easy and elegant way to use your computer and is designed from the ground-up to put the user in control and get things done. GNOME is avalible for all major Linux distrobutions and comes as the default of the popular Ubuntu.
Flathub
Flathub is a application marketplace for open-source applications which can be easily installed on any Linux distribution. With Flathub you can browse applications from your operating systems app center or the command line.
Tor
Tor is free and open-source software and network that enables anonymous communication and browsing. Tor can be used to defend yourself from aggressive tracking, surveillance and censorship and provides a good base for anonymity online. The name Tor is derived from the original project name "The Onion Router".
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.