Hydrogen (a.k.a. Hydrogen Drum) is an open source digital drum software created by Alessandro Comini, an Italian computer hacker who goes by the name Comix. Its primary purpose is to offer simple yet professional pattern-based drum sequencing to professional drum enthusiasts. Hydrogen has been downloaded from the internet more than fifty thousand times.
Hydrogen (a.k.a. Hydrogen Drum) is a very powerful digital drum sequencing program that was initially designed to produce quality drum loops for use with the popular Game Boy Advance game Metal Gear Solid. The basic function of Hydrogen is to produce drum beats. Hydrogen's features include a wide range of features, including the ability to change the sound of a given drum beat without making any changes to the original. It also has a feature known as "virtual pads" that lets you play and modify virtual pads while using Hydrogen drum beats.
Hydrogen has an extremely comprehensive collection of drum sounds. You can find drum sounds for the popular rock songs such as "Rock and Roll", "Climbing up the Walls", "Hells Bells", and many more. The list of possible drum sounds is very extensive and it doesn't stop here. Hydrogen also comes with many other useful features such as a huge database of sounds and drum patterns, a virtual DJ kit, a library that allows you to store and save your favorite songs, and much more. Hydrogen can be downloaded free of charge from the internet.