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.
Koding - A new way for developers to work.
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
Codiad - Codiad is an open source, web-based, cloud IDE and code editor with minimal footprint and requirements
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.
goormIDE - goormIDE is a cloud IDE service to maximize the productivity for developers and teams. Develop and deploy your service with powerful collaborative features, anytime and anywhere.