There is no doubt that constant exposure to computers (whether for work, play or study) not only causes serious damage to our eyesight, diminution of vision, visual fatigue, irreversible death of light-sensitive cells, maculopathy and cataract, but also inhibits the secretion of melatonin and causes sleep disturbances. However, computers have long been a necessary tool in the modern workplace, and have created a whole bunch of people who have to spend a lot of time in front of a computer every day.

When you get an unknown format of CD/DVD image file and don't know which burner to use to open it, or all the popular CD/DVD burning programs can not recognize this file, we can use CDmage to extract files directly from this image or convert it to some common disk image formats. In short, it lets you have no CD/DVD-ROM images that you can't burn, and can be regarded as an indispensable tool when working with CD/DVD images.

When three or more different notes are combined in a certain way and played at the same time, they are called chord. Learning the guitar must first learn the chords. But there are so many guitar chords, it is impossible to remember all of them at once. If you want to search for guitar chords on your computer, try Billion Chords, a well-known guitar chords querying tool.

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.

MyFirefox is a plug-in nature of tiny app for Mozilla Firefox, written and compiled using AutoHotKey and AutoIt, developed by cnjackchen (Jack Chen/Chen Jian/甲壳虫) from China. With MyFirefox, you don't need to install any version of Firefox. Instead, it automatically downloads your desired version of Firefox and extracts the installation files inside to make your own portable version of Firefox. You won't have to reconfigure Firefox even if you reinstall the system in the future, and the bookmarks are there too.