If want to thoroughly understand something, you have to learn its history first. How did it start? How to develop? How to become what it is today? In the end, it may be traced to a certain philosophy that adapts to various backgrounds in that era. Like guys learning art have to study the art history, similarly, in order to searchingly study programming, understand a computer language in-depth, we should go to learn how one language grew out of nothing.

ChemPlot is a simple, lightweight but functional chemical formula building & editing tool from Czech Republic. Whether you are a student or a teacher, and no matter you are in the production of courseware or writing papers, it can equip your work with chemical formulas written by our own hands.

MP3 Karaoke is a free, easy-to-use and pretty compact MP3-To-Karaoke (MTK) batch converter. With it in hand, we can quickly and easily (just one click, even drag & drop) convert our favorite bunch of MP3 music to Karaoke accompaniment. Thus we do not have to laboriously search for the rare music Karaoke any more. Just MIY (make it yourself)!

Win32 Disk Imager (AKA: ImageWriter) is very simple image-to-disk writing tool, free, open-source, lightweight and easy-to-use. Compared with similar tools, its advantages are more stable and reliable. And when write a large size of image file into USB storage device, you will find it also has some superiority on writing speed. Besides, the whole process has no effect to the performance of your computer.

Pencil is a free, open-source sketch mapping and GUI prototyping tool from Vietnam. Its hand-painted style can match the effect of drawing on paper veritably, and can independently run on Windows, Linux and Mac OS platforms or even installed as plugin of Firefox.