in reply to GUI for building connected blocks
mxgraph is amazing. I have also found these alternatives: thejit and joint.
(Sorry for the off-topic --non-Perl-- related comment)
EDIT: And another one: origramy
heck, even OpenLibreOffice Draw can do this. (See also Dia and many others.)
Good Day, Dean
Enlarge the circle
Square the circle
Think about rounding the square
Tell them to hire consultants
Fold the square
Use a hammer
Try to create a squircle
Results (174 votes). Check out past polls.