I've always liked projects like this but for me personally this one takes the crown just for sheer responsiveness - I expect to see a few "Working on it" because it's a browser but you've built a really solid foundation here, great stuff mate.
This is great but are there any plans for a self-hosted option? There's potentially a lot of VERY sensitive data to be stored and I wouldn't be comfortable just putting it up there (no offence) but would happily run it myself.
I've been looking for something like this for a while and this a very slick interface that covers pretty much all the bases.