Free Software for macOS
Shotcut
A free and openly developed video editing software that works cross-platform. Shotcut is developed on the MLT Multimedia Framework and is avalible for FreeBSD, Linux, macOS and Windows. Shotcut is released as open-source software under the GPLv3.
Termius
Termius is the SSH client that works on both Desktop and Mobile. The application lets you organize hosts into groups while allowing share settings across users. Terminus uses end-to-end encryption to ensure your data remains safe and secure, while keeping connection and command history.
Apple Siri
Apple Siri is a virtual assistant that is part of Apple's ecosystem of operating systems, including iOS, iPadOS, watchOS, macOS, and tvOS.
GarageBand
A fully equipped music creation studio right inside your Mac, iPhone and iPad. GarageBand comes bundled with macOS and contains a complete sound library including instruments, presets for guitar and voice. With GarageBand user can create music or podcasts with an easy-to-understand user interface and toolset.
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".
LispPad
LispPad is a simple, lightweight, IDE for developing and running Scheme code on macOS. The language supported by the integrated development environment LispPad is based on the R7RS (small) standard of the Scheme programming language. LispPad provides the a wide range of components inclduing a fully integrated Scheme interpreter, a large set of libraries, a text editor supporting syntax highlighting, smart indentation, parenthesis matching and text completion.
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.
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.
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.