TreeSize Free is a Windows disk utility that tells you where your disk space has gone. In this age of video downloads and games and applications that eat up gigabytes, you might be surprised at how quickly these can gobble up your hard disk space. With this free application from Jam Software you won’t have to worry about this at all.
FreeCAD is a cross platform parametric modeler that lets you create professional looking 3D objects. While the program has a lot of powerful features, no prior 3D or CAD experience is required. Not only is it easy enough for the hobbyist, but it’s got enough power for experienced CAD users who need advanced features.