Open Source Software for macOS
Mapserver
MapServer is an free and open-source platform for publishing spatial data and interactive mapping applications to the web. Originally developed in the mid-1990’s at the University of Minnesota, MapServer is openly developed and released under an MIT-style license, and runs cross-platform on macOS, Linux and Windows. MapServer is not a full-featured GIS system, nor does it aspire to be.
SocialVPN
SocialVPN or IPOP (IP-Over-P2P) is a user-centric, open-source software virtual network that lets end users build their own VPNs. SocialVPN is capable of establish peer-to-peer (P2P) virtual private networks with the help of a social backend like XMPP server (Jabber-Net or Google chat). Such reliable backend can securely authenticate users, maintain a list of each party and establish secure TLS for X.509 certificate exchange.
Pinta
Pinta is a free and open source drawing and image editing software similar paint.net. Pinta provides a simple yet powerful user interface that enables it users to draw and manipulate images on Linux, Mac, Windows, and BSD.
XAMPP
XAMPP is a free and open-source Apache web server stack used in web development. The XAMPP stack contains pre-configured versions of Apache HTTP Server, MariaDB, PHP, and Perl. XAMPP makes it really easy to install and use the stack on macOS, Linux or Windows.
VirtualBox
VirtualBox is a free and open-source hosted hypervisor for x86 virtualization, developed by Oracle. The software is used to create virtual machines that can be used for testing, and building software in virtually contained environments. VirtualBox is available for on macOS, Linux. Windows, Solaris and OpenSolaris.
Flutter
Flutter is an open-source UI software development kit created by Google. Flutter allows developers to write Android and iOS application in Dart. Flutter can be installed on any desktop computer and server that runs Linux, macOS or Windows. The SDK provide developers with a great developer experience with hot reload, that allows for quick iterations and a quick development workflow when building UI's, adding features and fixing bugs.
balenaEtcher
With balenaEtcher people can create an installation media of your operating system by burning the image on a bootable flash drive. The software, that was previously known as Etcher, is developed by Balena and the open-source community and released free of charge under the Apache-2.0 License. balenaEtcher can be downloaded and used for following operating systems: macOS, Linux and Windows.
Twine
Twine is an open source tool for telling interactive stories. With Twine, it simple to create interactive fiction that can be displayed as web pages. Each projects starts with a blank pages that binds itself and it can bind itself along an infinite number of spines extending in any direction. Twine runs nativley on macOS, Linux and Windows machines and on the web.
Arduino IDE
Audrion IDE is a code editor and integrated development environment for Audrio boards used by makers across the globe. The open-source Arduino IDE makes it easy to write code and upload it to any Arduino board. Audrion IDE provides an interface that features autocompletion, code navigation, and even a live debugger.
Inkscape
A free and open-source vector graphics editor developed by macOS, Linux and Windows. Inkscape provides a rich set of features and is widely used for both artistic and technical illustrations such as cartoons, clip art, logos, typography, diagramming and flowcharting. With Inkscape you can work on Scalable Vector Graphics (SVG) with a modern and intuitive UI and UX loved by many in the open-source community.