Digital license is a simpler and more efficient way of activation/authorization newly adopted by Windows 10, which only relies on the configuration information of your computer hardware. After activating system for the first time, as long as you don't change the CPU and other devices connected to the mainboard, you can feel free to connect to Microsoft server to repeatedly, automatically and permanently activate your Windows 10 at any moment, without having to input the product key again and again every time you install the system.

Windows KMS Activator Ultimate (WKAU for short, formerly called KMS Activator Ultimate) is an easy-to-use and safe-to-use (without any type of virus and no harmful effects to any system files) activator for Microsoft Windows Vista, 7, 8, 8.1, 10, Windows Server 2008, 2012 and Office 365/2010/2013/2016/2019. Compared with similar tools, it's a big file size.

Microsoft Toolkit (MTK for short, formerly known as 'Office 2010 Toolkit' or 'EZ-Activator') integrates Office Toolkit, Windows Toolkit and Office Uninstaller for 2003/2007/2010/2013/2016/2019... in one place. It allows to activate Windows, activate or uninstall Microsoft Office all products completely with one click!

Project64 (PJ64 for short) is a free and open-source Nintendo 64 (N64) game console emulator for Windows platform. It has very high game compatibility and dispenses with the BIOS files, allows users to play the classic N64 games on the computer with ease.

VisualBoyAdvance (VBA for short) is the number one, the most successful and most popular handheld emulator in the history of Game Boy Advance emulation. It is also one of the best video game emulators, and it's completely free and open source.