Try any of these ... Trial versions of Motion Analysis, EventLogger and VideoLocator for Mac and Windows. Also, instructional REALbasic sourcecode for a very simple calculator program. MotionAnal(X) Trial Size: 2.8 MB Mac OS X Trial version. Event + Spatial Analysis. Saving disabled, three movies permitted. 12/05 MotionAnal_501Trial.exe Size: 1.8 MB Windows trial Version. Event + Spatial Analysis. Saving Disabled, three movies permitted. 12/05 EventLoggerDemo319 Size: 2 MB Mac OS X trial version of Event Logger. One copy operation permitted. 12/05 EventLoggerDemo_319 Size: 1.8 MB Windows Trial version of Event Logger. One copy operation permitted. 12/05 VideoLocatorDemo(X) Size: 2.9 MB Mac OS X trial version .416. Spatial Accuracy Task. Saving disabled, one data export permitted. VideoLocatorDemo_416 Size: 6.2 MB Windows trial Version .416. Spatial Accuracy Task. Saving disabled, one data export permitted. simple calculator 2 Size: 87 KB REALbasic source code. Will not run without REALbasic (www.realsoftware.com). A very simple example.