Free educational MRI sofware version 3.1 is available for Windows, Mac and Linux. Easy to install and use. The software is described in RadioGraphics (Reviewer1: "Very nicely done...". Reviewer2: "...help greatly during classroom presentations of MRI basics and applications..."). Version 3.1 offers much improved visualization of magnetic resonance phenomena via support for an add-on, open-source OpenGL viewer that exploit the capabilities of modern 3D graphics cards. Click for info, example animations and download.