I XSPRINGIES, MOTIF_TOYS, A mass and spring simulation system for X windows   M xspringies is a simulator which allows you to interactively create and edit a M system of masses and springs.  The parameters of the masses and springs (such K as mass elasticity and spring K) as well as those of the surrounding system 3 (such as air viscosity and gravity) can be changed.   2 These systems can be loaded and saved into a file.  N I guess you could use xspringies for real work, but it's really intended to be a time waster.   