[giodamelio]

I have been contemplating making a similar thing for years now. Nothing I have used really has gotten me all the way.

Is it going to be open source?

[WalterSear]

I haven't figured out. My current plan is to open source the layer that allows users to access their own raw data, to ensure portability.

Unfortunately, I'm not in a position to maintain the project if it doesn't bring in revenue.

[andruby]

I've been looking for a Personal Knowledge Manager for a while (and been thinking about creating one). Feel free to message me if you're considering open sourcing or releasing it.