I invented a chart for those cases when we have a squared space for a single part-to-whole number. Bar chart does not fit there, it needs an elongated rectangular space for values to be distinguishable.

I call this one Spiral Bar Chart, but it could as well be a Spiral Gauge.

Pros:

• Not a pie-chart
• Takes up a square, which sometimes is exactly what we need

Cons:

• Difficult to make
• Impossible to read, but who cares as long as it is not a pie-chart