Awesome coin design done with free software such as Ubuntu and Python. This blog post describes how the design of a new limited edition 5 euro coin was created. The post provides detailed graphics of how author made a prize winning design for a Dutch Ministry of Finance.
From the post:
The Dutch Ministry of Finance organized an architecture competition for which a selected group of architectural offices (unstudio, nox, ...) and artists were invited, including myself. The goal of the competition was not to design a building, but the new 5 euro commemorative coin with the theme 'Netherlands and Architecture'. The winner will be rewarded with a nice price, but most of all with the honor: his design will be realized and will be a legal coin within the Netherlands.
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