YouTube Downloader Pro (full name: Jerry YouTube Downloader Pro) is a universal video downloader developed by Jerry Software from China. Don't be misled by its name, which is just the name it used when it was originally designed to download YouTube videos. Today, it is powerful enough to help you search, download, and convert videos from YouTube and hundreds of other popular video websites, and up to 500% faster than normal file downloaders.

PitchPerfect (full name: PitchPerfect Musical Instrument Tuner, PitchPerfect Guitar Tuner) is a free but highly accurate and professional instrument tuning software for Windows and Mac platforms, developed by NCH Software from Australia. It is specially designed for guitar players and other musicians, can help users quickly and effectively tune their instruments, so as to greatly improve the sound quality of instruments.

In fact, we are using Linux OS every day and everywhere, but most people don't realize it at all. The reason is that the only area that Linux has not conquered is the desktop operating system, which most people can touch is either Windows or Mac. Even Linux has dominated the Internet of things, mobile phone and data center, it's still considered out of the mainstream if it doesn't succeed in the desktop OS field.

Storyline is an extremely powerful new generation of advanced courseware making software developed by Articulate Global from China in 2012 (following the Articulate Studio 09). It is currently one of the most popular interactive e-learning multimedia courseware making tools in the industry. It's both very simple for beginners and powerful enough for experts.

Puppy Linux is one of the earliest lightweight Linux distributions, originally developed by Barry Kauler from Australia in 2003 (which is still active today). It is a very reliable operating system for both old computers and new Linux users! It is small in size, simple in structure, fast in speed, and comes with a wealth of drivers and applications. Even better, it can be installed and run directly on storage devices like external hard disks and USB flash drives (that is, it can be booted from any computer that supports BIOS and UEFI).