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EJE is a simple Java editor, perfect to learn Java, without learning a complex development tool. EJE is multi-platform (written in Java), light- weight, user-friendly and have several useful basic features. A good help to start with Java!
Supports the study of the Java for Aliens book (www.javaforaliens.com), or other my books (Italian Language) like www.nuovojava.it.
An android client of CodePad.org & ideone.com
CodePad.org is an oneline free multi-language compiler for developers.
ideone provide non-free services for the same work. ideone is much more powerful
Now the tool support
C,C++,Java (for ideone), Bash (for ideone), R (for ideone), Python, Ruby, Perl, PHP
xMxmlCompiler is an eclipse plugin that provides an Eclipse Builder on mxml resource changes and a GUI to the Flex 4 compiler (mxmlc) of the open SDK. It run on GNU/Linux and Windows eclipse platform version.