What to do?

When my family and I were cleaning out the second story of our cabin boat house. I just so happen to find a bunch of dirty/beautiful old windows. After talking to my grandparents I found out that a few of the windows were from their old house, and the rest were from the cabin when grandpa's parents still owned it. Now my problem is I don't know what to do with them. I've been searching Pinterest and the Internet gathering ideas, But I still don't know what I'm gunna do. (All the windows still have glass in them but some panes are cracked.)

All the windows are painted different colors and there are two of each size.