There are 2 repositories under amazon-dash topic.
Hack your Amazon Dash to run what you want.
A unix-style utility for responding programmatically to new ethernet devices joining a network
Pimatic plugin for Amazon's dash-buttons
amazon-dash buttonで勤怠メールを送ったり、ちょっとしたことを実現します
Create a plugin or jail running Amazon Dash on FreeNAS 11.2