AJLogo
- Beta version of a Java-based Logo with demos, a turtle graphics gallery, partial documentation, and Logo links.
- http://www.ajlogo.com/

XLogo
- Opensource Java version of XLogo for Windows, MacOS, and Linux. Free download and reference manual in several languages, updated May 2006. Source code available; tutorial available in French only.
- http://xlogo.tuxfamily.org

Logo Arts - Turtle Graphics Programming using XLogo
- Code and instructions for creating a variety of turtle graphics, animations, and simulations using the XLogo Java applet.
- http://www.keslian.co.uk/logoarts/

rLogo
- An easy to learn programming language designed for the World Wide Web. It is based on the Logo programming language.
- http://www.embry.com/rLogo/

NetLogo
- Written in Java NetLogo runs on MAC's, Windows, Linus and Unix. Designed to model complex systems it is the next generation of a series of multi-agent modeling languages that started with StarLogo.
- http://ccl.northwestern.edu/netlogo/

Turtle Tracks
- A fully-featured Logo interpreter and runtime environment written entirely in Java.
- http://turtletracks.sourceforge.net/