Triggertrap v1 and Triggertrap Shield for Arduino are as ‘open’ as we can make it. That means a ferry-load of open-source and a general ethos of ‘sharing is caring’, with a light brush-stroke of restrictions…
1) All Triggertrap source code will be 100% available for you to hack and modify as you please, and will be released under a GPLv3 licence. Details can be found on the GNU website.
2) The schematics for building one of these will be free to use and distribute, under Creative Commons. To be precise, we will license all instructions and under the CC-BY-SA-3.0 license (more info in readable English and in Legalese). In short, this means that you can use the content for anything, as long as you credit Triggertrap.com, and you have to share any changes you make to the layout under the CC-BY-SA-3.0 licence yourself.
3) The Eagle files to create your own PCB will also be available under CC BY-SA 3.0 (same as the schematics, above).
Restrictions & Trademarks
We are keeping control over the Triggertrap name and logo in any and all forms. Both the Triggertrap name and the Triggertrap Logo are trademarks of Triggertrap Ltd.
This ‘keeping our name but sharing our technology’ approach has worked very well for Arduino (which is the heart and soul of the Triggertrap v1 and Triggertrap Shield), and it makes sense to us, as well. For the full skinny, see their policy page, and ‘what should I call my boards’ on their FAQ page for their take on it.