Skale Tracker is described as 'music tracker (a special kind of music sequencer) available for Windows and Linux on the desktop as well as in a Flash-based browser verison' and is an app in the Audio & Music category. There are more than 25 alternatives to Skale Tracker for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and iPhone. The best alternative is LMMS, which is both free and Open Source. Other great apps like Skale Tracker are FL Studio (Paid), Ableton Live (Paid), Cakewalk (Free) and AudioTool (Free).
FL Studio (originally known as FruityLoops) is a full-featured Digital Audio Workstation (DAW) offering a complete range of professional tools for everything from audio editing and beat creation to advanced arrangement, composition, mixing and mastering.
Make music online with a powerful set of tools ranging from synthesizers and samplers to mixers, delays, reverb and much more. AudioTool is an advanced, collaborative DAW (Digital Audio Workstation) built for the browser.
Reason is a virtual studio rack with all the tools and instruments you need to turn your ideas into music. And it's more than just a set of excellent synths and effects. It's a complete music system. Step into the age of Reason.