Reshaping Euler
In 2009, AMS released version 3.0 of AMS fonts, in which Hermann Zapf reshaped many of the Euler glyphs, with implementation and assistance from Hans Hagen, Taco Hoekwater, and Volker RW Schaa.
The updated version 3.0 was presented to Donald Knuth on his birthday, January 10, 2008.
These updates were designed to work with the metrics for version 2.2, so no changes to the .tfm files were needed. Since the updates were made directly to the Type 1 files, the (incompatible) MetaFont sources have been removed from the distribution.
The reshaped version is released under OFL license.
Read more about this topic: AMS Euler