It's called ‘Free Pie Graph Maker’ (yes, a very creative name, I know!). While you'll notice its interface looks quite dated, the software is still functional for its core purpose. So, while it lacks ...

Pie chart set. Colorful diagram collection. Pie chart set. Colorful diagram collection with 2,3,4,5,6 sections or steps. Circle icons for infographic, UI, web design ...