IntelliJ IDEA - Capable and Ergonomic IDE for JVM
Sublime Text - Sublime Text is a sophisticated text editor for code, html and prose - any kind of text file. You'll love the slick user interface and extraordinary features. Fully customizable with macros, and syntax highlighting for most major languages.
Microsoft Visual Studio - Microsoft Visual Studio is an integrated development environment (IDE) from Microsoft.
Notepad++ - A free source code editor which supports several programming languages running under the MS Windows environment.
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.
GNOME - An easy and elegant way to use your computer, GNOME is designed to put you in control and get things done.