Bacon:  Community Driven Ubuntu Phone Core Apps
On his blog, Jono Bacon 
describes the Ubuntu Phone core apps development process while also soliciting volunteers to help on the design side. "
So, we have a good set of developers assigned for each app, but we would like to invite our community to contribute design ideas for each of these apps. We have already defined a set of user stories and functional requirements, and for each app we have also defined a set of the core screens and functionality that we will need design for. We would like to invite you wonderful designers out there to contribute your design ideas, and these ideas can provide food for thought for the developers."  The "core" apps are things like calendar, clock, calculator, email client, document viewer, social media apps, and so on.