Free Software for macOS
Syncthing
Syncthing is a free and open-source continuous file synchronisation software that utilise peer-to-peer technology. The software allows users to send files between two or more computers in real time, safely protected from prying eyes. Syncthing is available for Windows, Mac, Linux, Android, Solaris, and BSD.
GitKraken
Unleash the power of Git with GitKraken, the free Git GUI for Windows, Mac & Linux. With GitKraken you can easily work with repositories hosted on any of these sites. Clone, add remotes, and create/open pull requests without ever leaving the application. GitKraken is an open-source project released as two versions, GitKraken Free and GitKraken Pro. The free version works with major platforms like GitHub, GitLab, Bitbucket while providing extra features in the pro version to work with GitHub Enterprise, GitLab Self-Managed, Bitbucket Server, and Azure DevOps (VSTS).
GNUnet
Help build the internet of tomorrow with GNUnet. It's a software framework for fully decentralized, peer-to-peer networking that offers link encryption, peer discovery, resource allocation, and secure communication. The goal of the project is to replace the old insecure Internet protocol stack. GNUnet includes a fully decentralized DNS (Domain Name System) that utilize a directed graph instead of the hierarchical system implemented today. It also has it's own identity system re:claimID, a decentralized Identity Platform that is baked into GNUnet.
Flickr
Flickr is home to millions of people who share billions of photos with each other and the world. It's a photo and video sharing social network that can be used to host, share and promote images and videos. Flickr is mainly used by passionate photographers who use to platform to host their material, reach a broader audience and make new connections.
NoteLedge
NoteLedge is a note taking software for mobile and desktop. With NoteLedge you can stay orginized and make interactive notes with visual media including images, videos or audio recordings.
QtPass
QtPass is free and open-source, cross-platform password manager that is part of the pass ecosystem. The pass project is an open initiative that builds the standard unix password manager, a universal protocol for password management. This means that you can easily switch away from the QtPass to a new client, as long as it uses the "pass" password store.
Standard Notes
Standard Notes is a safe place for your notes, thoughts, and life's work. With Standard Notes you can create, edit and manage notes with a complete encrypted app that is free and open source.
DB Browser for SQLite
A high quality, visual, open source database management tool for SQLite databases. With DB Browser for SQLite, users and developers can create, search, and edit databases. DB Browser for SQLite uses a familiar spreadsheet-like interface, and complicated SQL commands do not have to be learned.
Janet
Janet is a functional and imperative programming language that runs on Windows, Linux, macOS, and BSDs. Janet makes for a good system scripting language, or a language that can be embed in other programs. The entire language (core library, interpreter, compiler, assembler, PEG) is less than 1MB.
Buttercup
Buttercup is a free and open-source password manager, available on all major platforms. With Buttercup you can track and store your login information for any service and device that you use. The application's securely encrypted vault allow you to store account information securely with additional support for 2FA/OTP (TOTP).