Ruby

Ruby Home Page.
Ruby on Rails.
Ruby Central.
ruby-doc.org.

Logo Interpreters

KTurtle is already installed with Fedora.

The logo blog: http://tacojuice.org/plnews/Languages/Logo/ contains news about three Java projects: jLogo, XLogo, and StarLogo. The freshmeat site is useful, as well. Logo is available even in Python (http://pylogo.org). There are several other Logo interpreters written in Java,

• even as an applet,
• or tortue.

Good collection of Logo links are

• http://www.freeprogrammingresources.com/logocompiler.html
• http://el.media.mit.edu/logo-foundation/products/software.html
  

The oldish (classical?) UCB Logo works fine on Windows, but does not have any graphix on my Fedora Linux. Some nice features are described in http://www.erzwiss.uni-hamburg.de/Sonstiges/Logo/logofaqx.htm. The web-page of its graphix front-end glogo says it is unfinished. Continuation at http://www.physik.uni-augsburg.de/~micheler/.