ParticleFlow is a two dimensional modeling software. This software, along with TopoDrive, are meant to simulate two groundwater processes: topography-driven flow and transport of fluid particles. It helps the user to better understand and determine groundwater flow processes.
Win
Physlet Physics
Physlet Physics are free physics applets and it’s free for non-commercial use. It’s made from the same team that makes Open Source Physics Project. Over 2,00 individual exercises have been created on Physlet. The applets create simple graphics to demonstrate the salient features of physical phenomena. Physlet Physics runs on Windows, Mac, and Linux devices.