I've been working on Histre and it aims to be your internet copilot, helping you with painless, seamless knowledge management and other things.
One example use-case is, vacation planning. My gf used to use a spreadsheet to research and shortlist AirBnBs. It was painful. We're off to Portugal in a few days and she used Histre to plan the whole thing. She took notes and tagged AirBnB listings right from their website and filtered it on Histre. She's ecstatic ;-)
I'd love to hear from you (k@histre.com) and I'll build any features that'll help you.