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.
Notepad3 - Notepad3 is a fast and light-weight Scintilla-based text editor with syntax highlighting.
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.
TED Notepad - TED Notepad is a portable text editor software that deals with a large variety of text processing tools, supplemental text clipboards, high accessibility through hotkeys, and a customizable number of settings and options.
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
Notepad++ - A free source code editor which supports several programming languages running under the MS Windows environment.