Free Software for macOS
Xcode
Xcode is Apple's premiere development environment for MacOS. At the heart of the Xcode tools package is the Xcode IDE which provide the tools you need to reate, debug, and optimize your applications. Xcode provides customizable font sizes for the navigator, streamlined code completion, and document tabs. Which allows you to build universal apps with support for MacOS and Mac with Apple Silicon.
Adminer
Adminer provides administrators, developers and website maintainers with a full-featured database management tool written in PHP. With Adminer you can to a database servers with username and password. List fields, indexes, foreign keys and triggers of table. Change name, engine, collation, auto_increment and comment of table. Alter name, type, collation, comment and default values of columns. Create, alter and drop indexes, foreign keys, select form view and call stored procedures and functions. The software is distributed under the Apache License which makes it free and open-source. Adminer supports a wide variety of relational and NoSQL databases including MySQL, MariaDB, PostgreSQL, SQLite, MS SQL, Oracle, Firebird, SimpleDB, Elasticsearch and MongoDB.
Seafile
Seafile is an open source file sync & share solution designed for high reliability, performance and productivity. Sync, share and collaborate across devices and teams. Seafile can be self-hosted, or provided as a managed and hosted solution. With Seafile, you can rest assured that your files are safe as all files are encrypted before syncing with the server, even system administrators have the capability to view your personal files.
Brackets
Brackets is a modern, open sourc ecode editor that is lightweight, yet powerful. The editor features a blend of visual tools and a clean user interface packed with features like Live Preview, Quic Edit and Preprocessor Support. With Brackets you can design and develop for the using technologies like HTML, CSS and JavaScript.
CockroachDB
Cockroach is a distributed key/value datastore that allow you to build, scale and manage modern, data-intensive applications. The database delivers distributed SQL by combining the familiarity of relational data with limitless, elastic cloud scale and bulletproof resilience. Correct data is a must for mission-critical and even the most common applications. CockroachDB provides guaranteed ACID compliant transactions, allowing you to fully trust your data.
Sia
Sia is a decentralized storage platform secured by blockchain technology. The Sia Storage Platform leverages underutilized hard drive capacity around the world to create a decentralized data storage marketplace that is more reliable and lower cost than traditional cloud storage providers. With Sia you can store files in the decentralized cloud without signup requirements, servers and trusted third-party providers. On average, Sia's decentralized cloud storage costs 90% less than incumbent cloud storage providers. Storing 1TB of files on Sia costs about $1-2 per month, compared with $23 on Amazon S3.
Tails
The Amnesic Incognito Live System or Tails for short is a portable operating system that protects you against surveillance and censorship. The operating system can started from a USB stick on any macOS, Linux or Windows computer, leaving no trace on that computer after it has been shutdown. Allowing you to make any computer into a Tails protect environment free of surveillance. Tails includes a variety of open source tools that can be used to browse the web, edit document and communicate saftley. Including Tor, Tor Browser, Pidgin, Network Manger, VeraCrypt, GNUPG, MAT, KeePassXC, GtkHash and many more.
Qt
Qt includes everything you need to build cross-platform applications that run on various software and hardware platforms such as Linux, Windows, macOS, Android or embedded systems with little to no change in the underlying codebase. Qt is released open-source under the GNU Free Documentation License, and provides a commerical offering for enterprises.
VLC Media Player
A free and open-souce cross-platform multimedia player software and streaming media server. VLC Media Player has been developed openly since 2001 by the VideoLAN project and is available for desktop and mobile devices. VLC Media Player is most commonly use to view videos and movies locally on your devices.
Zig
Zig is a general-purpose programming language and toolchain for maintaining robust, optimal, and reusable software. It's a simple programming lanaguage that gocus on debugging your application rather than debugging your programming language knowledge. Zig provides no hidden control flow, hidden memory allocations, preprocessor and no macros. Allowing developers to write fast and clear code capable of handling all error conditions.