I think you would attract more potential collaborators if you told us a little bit about yourself: your background, tools you're comfortable with, etc, basically why would someone want to partner with you.

Also, why don't you tell us why you want to do this, what you hope to get out of this, how do you prefer to communicate, how serious are you about this (e.g. how much time are you willing to invest? are you committed to take a project to completion?), etc.

Finally, do you want to propose a project that interests you, or are you looking for an idea for a project that someone already wants to do?