Free Software for Windows
Windows Sandbox
Windows Sandbox is a virtual machine application that lets you quickly spin up a virtual clean OS imaged from your system's current state so that you can test programs or files in a secure environment that's isolated from your main system.
AIMP
AIMP is a free audio player for Windows and Android, originally developed by Russian developer Artem Izmaylov. With AIMP you can listen to your favorite music and create play lists, bookmarks and manage the music your way.
Notable
Notable simple yet powerful Markdown editor that features multi-cursors, a minimap and best-in-class syntax highlighting.
Apache Storm
Apache Storm makes it easy to reliably process unbounded streams of data for real-time processing. It is a distributed stream processing computation framework written predominantly in the programming language Clojure. The software is released free and open-source under the Apache License. In a nutshell, Apache Storm does to real-time processing, what Apache Hadoop did to bactch processing. Large corporations like Weather Channel, FullContact, Twitter, Yahoo, Spotify, and Alibaba use and trust Apache Storm for big data analytics with fault-tolerance and fast data processing.
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.
Uplay
Uplay is the ecosystem of players services for Ubisoft games across all platforms. It aims at giving the best environment for all players to enjoy their games and connect with each other whatever the device. Uplay is a free service available corss-platform.
GOG Galaxy
With GOG Galaxy you can organize your games across platforms into one functional and beautiful library. The software allows you to import all your games from PC and consoles, build and organize them into one master collection. Within the user interface you can keep track of all your achievements, hours played and games owned, combined across platforms, and install and launch any PC game you own, no matter the platform.
TigerVNC
TigerVNC is a high-performance, cross-platform implementation of VNC (Virtual Network Computing). The TigerVNC client/server application allows you to launch and interact with graphical applications on remote machines over the internet or a local network. TigerVNC provides the levels of performance necessary to run 3D and video applications, and it attempts to maintain a common look and feel and re-use components, where possible, across the various platforms that it supports. TigerVNC also provides extensions for advanced authentication methods and TLS encryption.
Runtastic
With Runtastic you can track your runs, bodyweight training sessions, and other fitness & sports activities with. Runtastic makes you stay motivated sharing data with friends, set new goals, start a training plan, and live a healthier life.
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.