Believe it or not, every time you turn on the Newton 2.0 it checks whether a solar eclipse is scheduled to happen on that day and, if it is, it runs a neat graphic of the correct type of eclipse.   Frankly, I'm really impressed with this level of frivolity.
Eclipse is also frivolous.  If you are like me and don't know when the next solar eclipse is, and anyway don't want to wait, Eclipse will let you run the four built-in Eclipse graphics any time you want..

Eclipse is c. S. Milman 1996 and all rights are reserved.  It is, however, freeeware.