» Karel Home Page    Tutorials, downloads, and information.    http://www.mtsu.edu/~untch/karel/index.html

» Karel J. Robot    Java version of Karel.    http://csis.pace.edu/~bergin/KarelJava2ed/Karel++JavaEdition.html

» Karel++    Object-oriented version of Karel.    http://csis.pace.edu/~bergin/karel.html

» Marvin    A Java-based RoBOTL interpreter.    http://www.kluge.net/mqp/

» Sourceforge: Karel The Robot    Karel for Unix.    http://karel.sourceforge.net/

» xKarel    Open source port for Windows and Linux.    http://xkarel.sourceforge.net