Open Source Software for macOS
Otter Browser
Otter Browser is a cross-platform, free and open-source web browser that is designed to be very modular. With Otter Browser, the user can replace whole bookmarks manager or history viewer by the use of plugins and the built-in abstraction layer. The browser is built with the Qt WebEngine as a wrapper around Chromium and released under the GPLv3 and is available for Linux, macOS, and Windows platforms.
ProtonVPN
ProtonVPN is a virtual private network service provider operated by the Swiss company Proton Technologies AG, the provider of ProtonMail. Just like ProtonMail, ProtonVPN is a community supported project that aims to build a safer Internet that also protects civil liberties. The service provides a strict no data logging policy, that ensures that no personal data is kept by ProtonVPN. It also has Tor integration and SecureCore servers for additional security if needed. Currently, ProtonVPN provides over 560 servers in more than 40 countries.
C
C is a free and open-source general-purpose, procedural programming language. The language supports structured programming, lexical variable scope, and recursion, with a static type system. By design, C provides constructs that map efficiently to typical machine instructions. C was first created and released in 1972 at Bell Labs by Dennis Ritchie, today C is used in systems where you need absolute control over memory management such as OS kernels and other mission critical software.
Opera Developer Browser
With Opera Developer Browser you can join in on the earliest experiments for the browser. The browser is recommended to be used by developers, enthusiasts and advanced users. Opera Developer Browser and Opera Beta Browser was introduced to improve the development cycle of the browser and to beta tests new version before final release, to the public.
Opera Beta
If you are looking for features planned for the next version of Opera, then Opera Beta is for you. With Opera Beta you can get a peak of and beta test new features that will be released in the upcomming release of the Oprea Browser. Allowing you to early test new features and contribute to development of the browser.
Midori
Midori is a free and open-source web browser based on GTK and Webkit. The browser is lightweight and fast that works cross-platform.
Rebol
Rebol is a lightweight, cross-platform data exchange programming language. The language is designed by Carl Sassenrath and is suited for network communications and distributed computing. Rebol's unique simplistic design makes it a productive language that is loved by its users.
Baidu Browser
Baidu Browser, previously known as Baidu Spark, is a Chromium-based web browser. The browser utilize the same engine as Google Crhome while providing and attractive UI, changeable skins, video download and screenshot capture and seamless integrations with social networks like Facebook.
Beaker Browser
The Beaker Browser is an experimental peer-to-peer web browser for the modern web. The browser allows people to create Hyperdrive websites from within the browser itself, without setting up servers or touching the command-line. These Hyperdrive sites allow other users to visit your site directly from your computer and can be setup using the built-in code editor and published with a single click.
Hack
Developed by Facebook as free and open-source dialect of PHP, Hack is a programming language for the HipHop Virtual Machine. Hack is licensed under the MIT License and allows developers to use both dynamic typing and static typing.