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.
HTML-Notepad - HTML WYSIWYG editor for structured documents
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
Notepadqq - Notepadqq is a linux clone (identical application) of Notepad++
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.
iNotepad - Write and organize all your texts and notes on Mac.