Replace a table with spans

Center any number of floating spans

It's not a problem if one of the spans has a different height...

...or a different width

You can also specify span width in %

Try resizing this window. You will see that the bottom blocks have a flexible width, while all the others can jump from one line to another, while maintaining their centered position.

Oh, and by the way: it works perfectly well when you don't assign any specific width or height to your spans as well!