Muvizu (formerly called Muvizu 3D, now called Muvizu Play, Muvizu:Play+) is a 3D animation program built on the Unreal Engine, developed by Digimania from United Kingdom. It is designed for users who want to create 3D animations without the need for costly software or specialized training, and has gained popularity in educational settings.

aria2 is a well-known, long-established, feature-rich and powerful universal file downloader that is very popular among programmers. However, its command line operation mode and overly complicated installation and configuration process make it difficult to popularize among normal users. So a series of GUI front-ends for aria2 were derived, and Persepolis Download Manager is one of the best. It saves users the trouble of configuring aria2 and using the command line to download files, and simplifies the operations.

If you need to deal with 3D projects or models frequently, then you often need to convert between multiple 3D file formats, so as to operate proprietary file formats supported by other 3D software in your 3D software. In this case, what you need is a 3D file conversion tool. If you have used FinalMesh, 3D Object Converter, you can also give Spin 3D a try.

Windows Photo Viewer, a built-in picture viewing program in Windows, is not only very slow to open large pictures, but also very laborious to view large-sized pictures (you need to reach the top with great effort, and then drag and drop pictures with great effort). In order to obtain a faster, more efficient, and better image viewing experience, we often need to use a third-party image viewer.

Many classic ebooks and tutorials are released in CHM format, while Android doesn't support viewing these files by default. Even many popular ebook readers (such as Moon+ Reader, FBReader, Librera) have poor support for CHM format. In this case, we have to use specialized CHM readers such like SuperCHM, Chm Shelf and Chm Reader X.