Squeak
Squeak VM for iPAQ and other Windows CE platforms
Squeak on iPAQ
Recently, Andreas Raab and others reported problems aruond GAPI on iPAQ 38xx. And also Henrik Gedenryd reported that the GAPI-enabled VM doesn't work on E-200 properly and I suspect this is due to the difference of the frame buffer geometry.
Squeak has a number of user interfaces:
• A new, experimental interface called Tweak which aims to be the next generation of Squeak interfaces.
from Wikipedia