Celestia is a free and open-source 3D astronomy simulation software for Windows, Mac, Linux, Android and iOS platforms. Its real-time space simulation lets you explore and experience our universe in three dimensions. Celestia combines massive astronomical data information with high-resolution images, and has rich plug-ins support and convenient operations. These make it popular with users.

If you love indie games and aren't looking at the commercial game stores like Steam, Origin, or Humble Bundle, then you probably know itch.io - a game store devoted exclusively to indie games. Here, both game developers and players can set their desired prices, and many developers choose to make their game works or prototypes at Game Jam available for free download.

Krita (formerly called KImageShop, Krayon) is a free, open-source and cross-platform digital painting software developed by Krita Foundation (part of the KDE Community) from Sweden. It is fully functional, capable of the entire painting process from drafting, lining, coloring to post-adjustment; can draw concept sketch, illustration, cartoon, animation, scene and 3D mapping; supports digital board, pressure sensing, anti-shake, layers, filters, color management, and other functions.

Windy.com (formerly called Windyty, Windytv) is a very professional and practical wind map & weather forecast application for Android and iOS platforms, developed by Ivo Lukačovič from Czech Republic in 2014. With it, users can not only view a variety of professional weather parameters and specific values, but also enjoy the dynamic, stunning weather changes animation. It sets visual, artistic, practical in one place, and is deeply loved by the majority of users.

The most direct application of virtualization technology (VT) is to run virtual machines in a system. If the CPU supports the VT, you can install virtual machines on your system; on the other hand, if your CPU does not support VT, then you will not be able to use virtual machine applications. That also means it's time to change your computer. To enable VT: Restart computer to enter the BIOS; Find the corresponding VT option; Adjust the setting from "Disable" to "Enable"; Save and restart.