Yea, I use my latest side project which is an OS X menu bar app that blocks distracting websites (like HN): http://www.heyfocus.com/

I don't think it's a "need" but I do enjoy using it and built it because it's something I wanted.

If you're interested I just did a write-up on it http://bradjasper.com/focus.html and open-sourced it http://github.com/bradjasper/focus

My goal lately is to try and find stuff that I like building and that has a market—not having to pick either or.