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Hefeweizen is a sans serif font built entirely with straight lines and angles based on 60-degree increments. Many of the characters follow blackletter form, but not strictly.
It also works suprisingly well at smaller sizes, and can be used for short blocks of text.
It was (very) loosely inspired by Frere-Jones' "Pilsner", but quickly developed its own direction.
The character set is not yet complete, but this sample gives a good feel for where it's going.
As always, critique is most welcome.