HTML-909 is described as 'very accurate simulation of the classic Roland TR-909 drum machine, created with HTML5 and accessible using any modern browser. Formerly available through its own domain, the app is now available through a GitHub repository, though audio samples are not included' and is an website in the Audio & Music category. There are more than 10 alternatives to HTML-909, not only websites but also apps for a variety of platforms, including Windows, Android, Linux and Android Tablet. The best alternative is Hydrogen, which is both free and Open Source. Other great sites and apps similar to HTML-909 are drumbit (Free), HammerHead (Free), Qwerty Beats (Free) and Rhythm Studio (Paid).
Hydrogen is an advanced drum machine for GNU/Linux. It's main goal is to bring professional yet simple and intuitive pattern-based drum programming. Features: - General -- Very user-friendly, modular, fast and intuitive graphical interface based on QT 4.
HammerHead is a simple TR-909-like drum computer program aiming at the dance-scene. You can use it to create perfect Techno loops, Jungle patterns or House beats, but it's also suitable for Hip Hop, Triphop, Rap, Industrial and almost any other music you can think of.
Rhythm Studio is a a must have app for musicians! It is a premier universal electronic music making app, boasting richly detailed graphics and incredible sound, with impeccable recreations of classic synths and drum machines along with other amazing studio hardware.
The orDrumbox is a free drum machine software, creative, with unusual features : auto-composition, polyrythmes, arpeggiator, automatic sounds/track , custom softsynths, lowfi rendering, etc. This tools can compose bass line and complete songs!.