Netbeans - NetBeans IDE 7.0. Develop desktop, mobile and web applications with Java, PHP, C/C++ and more. Runs on Windows, Linux, Mac OS X and Solaris. NetBeans IDE is open-source and free.
Mixxx - The most powerful free DJ software in the world.
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
Guitarix - Guitarix is a simple Linux Rock Guitar Amplifier for https://alternativeto.
Eclipse - Eclipse is an open source community, whose projects are focused on building an open development platform comprised of extensible frameworks, tools and runtimes for building, deploying and managing software across the lifecycle.
VirtualDJ - Virtual DJ Software - MP3 and Video mix software for DJs