I have started a this discussion thread and an iPetition to show Xamarin the level of support the Xamarin community has for Open Sourcing Xamarin.Forms. Even Microsoft has moved heavily towards the open source model with a number of their key frameworks and infrastructure projects, I am proposing that Xamarin do the same, they would remain the curators of the project but I believe they would find substantial support from the Xamarin community as a whole with contributions and bug fixes.
If you would like to see Xamarin.Forms open sourced, please visit the link below and add your name to the list, then tell your developer friends and collegues.
https://www.ipetitions.com/petition/open-source-xamarinforms
Also drop a comment in this thread to keep it active and sorted to the top of the Forums list so that it is easier for others to find.
Thanks
M