the GNU project’s implementation of Forth[http://gcc.gnu.org/fortran/—The main website for Gfortran](http://gcc.gnu.org/fortran/—The main website for Gfortran)
[http://groovy-lang.org—The main website for Groovy](http://groovy-lang.org—The main website for Groovy)
[http://haskell.org—The main website for Haskell](http://haskell.org—The main website for Haskell)
[http://www.java.com—The main website for Java](http://www.java.com—The main website for Java)
[http://www.w3schools.com/js/default.asp—The W3C Tutorial page for](http://www.w3schools.com/js/default.asp—The W3C Tutorial page for)
JavaScript, which is also a great place to learn HTML and CSS
[http://lisp-lang.org—The main website for Common Lisp](http://lisp-lang.org—The main website for Common Lisp)
[http://www.clisp.org—The main website for GNU Cisp, an implementation of](http://www.clisp.org—The main website for GNU Cisp, an implementation of)
Common Lisp
[http://www.lua.org—The main website for Lua](http://www.lua.org—The main website for Lua)
[http://www.perl.org—The main website for Perl](http://www.perl.org—The main website for Perl)
[http://php.net—The main website for PHP](http://php.net—The main website for PHP)
[http://www.python.org—The main website for Python](http://www.python.org—The main website for Python)
[http://www.ruby-lang.org/en/—The main website for Ruby](http://www.ruby-lang.org/en/—The main website for Ruby)
[http://www.scala-lang.org—The main website for Scala](http://www.scala-lang.org—The main website for Scala)
[http://live.gnome.org/Vala—The main website for Vala](http://live.gnome.org/Vala—The main website for Vala)
[http://scratch.mit.edu—The main website for Scratch](http://scratch.mit.edu—The main website for Scratch)
https://help.ubuntu.com/community/PowerUsersProgramming—A
wiki page about programming using Ubuntu as your development
platform