Free and Open Source Software
Koa
Koa is a free and open-source, expressive HTTP middleware framework for Node.js. Koa provides a great developer experience that makes writing web applications and APIs more enjoyable. Koa's middleware stack flows in a stack-like manner, allowing you to perform actions downstream then filter and manipulate the response upstream. Only methods that are common to nearly all HTTP servers are integrated directly into Koa's small codebase. This includes things like content negotiation, normalization of node inconsistencies, redirection, and a few others.
Nightwatch.js
Write efficient and straightforward end-to-end tests in Node.js which run against a Selenium/WebDriver server.
MeiliSearch
An open source, blazingly fast and hyper relevant search-engine that will improve your search experience.
The Eternal Jukebox
With The Eternal Jukebox you can create infinite music form a single song. The Eternal Jukebox is a web app that will generate a never-ending and ever changing version of the song. The app achives this by sending your uploaded track over to The Echo Nest, where it is decomposed into individual beats. Each beat is then analyzed and matched to other similar sounding beats in the song. The Eternal Jukebox then generate your infinite song and makes it avalible in the web application for you to listen to.
UltraVNC
UltraVNC is a powerful, easy to use and free remote desktop access software. The program allows you to use your mouse and keyboard to control the other PC remotely over internet or a network. Allowing you to work on a remote computer, as if you were sitting in front of it, right from your current location.
CakePHP
CakePHP is a free and open source web framework for the programming language PHP. With CakePHP you can with ease, develop, deploy and maintain web applcations. CakePHP provides a sound structure that allow you to create organized applications that can scale and adapt as your project grows. Out of the box, CakePHP provides features like bake script, a rich query API, short RL syntax, database support for MySQL, SQLite, PostgreSQL, SQL Server, Oracle and more. It also includes features that make you app easier to develop such as automatic code generation, database migrations, fast and flexible templating language, and localization.
ReverseSSH
ReverseSSH is a statically-linked ssh server with a reverse connection feature for simple yet powerful remote access. Most people find ReverseSSH useful during HackTheBox, CTF's and similar challenges.
C#
C# is a general-purpose and multi-paradigm programming language. C# encompasses strong typing, lexically scoped, imperative, declarative, functional, generic, object-oriented, and component-oriented programming disciplines.
Kotlin
At Google I/O 2017, Kotlin was announced as to official development and programming language for Android. As it became the third language to be fully supported by the platform with Java and C++. However, Kotlin can also be used cross-paltform for native, server-side and web development as well as for data science projects. The language is statically typed and general-purpose, and is designed from the bottom up to increase developer happiness.