Open Source Software
Qt Creator
Qt Creator is a cross-platform integrated development environment (IDE) built for the maximum developer experience. Qt Creator runs on macOS, Linux and Windows desktop operating systems, and allows developers to create applications across desktop, mobile, and embedded platforms.
Jitsi
Jitsi is an open-source project and software toolset that allows you to easily build and deploy secure video conferencing solutions. At the heart of Jitsi are Jitsi Videobridge and Jitsi Meet, which let you have conferences on the internet, while other projects in the community enable other features such as audio, dial-in, recording, and simulcasting. Jitsi supports popular protocols such as SIP, XMPP/Jabber, ICQ/AIM, Windows Live, Yahoo!, Google Hangouts, OTR, ZRTP and more.
Guix
Guix is an advanced distribution of the GNU operating system. The operating system is released under the GNU General Public License is 100% free to use and distribute. Guix supports transactional upgrades and roll-backs and unprivileged package management. At the core of Guix is an hackable system that provides Guile Scheme APIs that includes high-level embedded domain-specific languages to define packages and whole-system configurations.
Collapse OS
The creator or Collapse OS predicts a global supply chain collapse before the year 2030 and is building the operating system to counter such an event. Collapse OS is designed to run on minimal and improvised machines, interface through improvised means (serial, keyboard, display), edit text and binary contents, compile assembler source for a wide range of MCUs and CPUs, read and write from a wide range of storage devices and assemble itself and deploy to another machine. The goal of the project is to be as self-contained operating system that can be built without external resources like internet, on a machine of personal design, built from scavenged parts with low-tech tools.
Firefox Focus
Firefox Focus is a free and open-source privacy-focused mobile browser from Mozilla. With Firefox Focus you can browse the web with your Android or iOS powered mobile phone in a secure and privacy focused manner. Firefox Focus allows you to easily erase your browsing history, passwords, bookmarks and cookies and prevent unwanted ads from following you across the web.
Matrix.org
Matrix.org is an open network for secure, decentralized communication. It gives you a simple HTTP APIs and SDKs (iOS, Android, Web) to create chatrooms, direct chats and chat bots, complete with end-to-end encryption, file transfer, synchronised conversation history, formatted messages, read receipts and more. All conversations on Matrix are replicated over all the servers participating in them, meaning there are no single point of control or failure.
Taskwarrior
Taskwarrior is an open-source, cross platform time and task management tool that can be used to effectivly keep track on progress and handle collaborative tasks. Taskwarrior's provides a graphical user interface as well as a command line tool allowing you to get things done and track progress from your terminal. Taskwarrior is powered by the Taskserver, an free and open-source server that can be installed on your cloud infrastructure or on-premise.
Ripcord
Ripcord is a desktop chat client for group-centric services like Slack and Discord. It provides a traditional compact desktop interface designed for power users. It has a small resource footprint, responds quickly to input, and gets out of your way. With Ripcord, you can connect with friends, family and co-workers.
Nubo
Nubo is a self-hosted file sharing application that runs on macOS, Linux and Windows (64-bit versions only). The application consists of two parts, a cloud-base part which is s mall PHP application that must be installed on a server, and the client which can should be installed on your local machne to be able to syncronise and share with the cloud. In that sense Nubo is similar to other file sharing solutions in that you drop files into a special folder on your computer to save and sync with cloud instance.