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.
Lime Text - Lime Text is an open source text editor.
IntelliJ IDEA - Capable and Ergonomic IDE for JVM
Codesmith - CodeSmith is a template-based code generator tool. It features a syntax nearly identical to ASP.
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.
Codility - Codility provides a SaaS platform with advanced validation, security and protection features to evaluate the skills of software engineers.