LOGO

A powerful programming language built to be easy for children to use. LOGO is essentially a dialect of LISP without the parentheses that traditional LISP requires. It has been implemented in many versions including Brian Harvey's UCBLogo and the multimedia authoring toolkit called Hyperstudio.

There are lessons to be learned in all of these systems if OLPC application developers wish to stand on the shoulders of giants rather than reinvent the wheel over and over again.

Variations

UCBLogo

http://www.cs.berkeley.edu/~bh/logo.html

Needs a better GUI (Brian Harvey is working on one, but he is working on it alone and as a hobby). It can be translated (without recompilation) to languages that have their character sets in 1 byte encodings. It was been translated to Spanish (LogoES)

aUCBLogo

http://www.physik.uni-augsburg.de/~micheler/

Needs testing, packaging and materials (maybe it's still too beta)

MSWLogo

http://www.softronix.com/logo.html

Needs a migration to Linux. Has lots of learning material on the Internet

FMSLogo

http://sourceforge.net/projects/fmslogo

Needs a migration to Linux

PyLogo

http://pylogo.org/PyLogo.html

Works under Python (which, it seems, will be a given in the laptop). Is this enough Logo?

Scratch

http://llk.media.mit.edu/projects/summaries/scratch.shtml

Runs under Squeak (which is bulky?). Is this enough Logo?

NetLogo

http://ccl.northwestern.edu/netlogo/

Freeware, but not open source. Requires Java. Actively developed; high quality.

LogoWiki

http://www.logowiki.net

Recently developed by Alan Kay and friends. Built on top of JavaScript.

Necesary features

• Multilingual support
• Trigonometric functions, sqrt, exp, power, log, ln (to be able to draw at least figure 24 accurately)

Requested Features

• Optional inputs, like UCBLogo
• ColorUnder (or "Pixel")
• SetPenColor