So with Progressive Web Apps coming to their own, it is worth knowing that you can develop great PWAs with the Ionic SDK. I invesitigated in this and spoke about this at the Angular UP conference in Tel Aviv last November and will be at the NGVikings conference talking about it in Feb 2017.
I have made all my code open source, and please feel free to contribute on the Github page here https://github.com/saniyusuf/
You can find the video to my talk here on Youtube https://www.youtube.com/watch?v=xPRqkquRyew.
You can also find slides to the same talk here http://slides.com/saniyusuf/angular-up-2016
Also if you have any Ideas about possible open source projects you want us to collaborate as a community and work on, hit me on twitter let's get hacking.