(I apologize in advance since this is not strictly Mathematica-related, but this still seems potentially relevant to audience. Feel free to remove or refile.)
So I got sick of keeping all my notes spread across Mathematica notebooks, and wrote a tiny website platform to let me do my math musings and easily share things. Basically, I wanted something that let me quickly and easily jot down stuff with markdown and latex.
I've been using it for months and it's great for me, but I have no idea whether anyone else would be interested in this sort of thing... but if anyone would be, it'd be you lot. So if you want, see it / try it / use it at http://stacked.by.tc.
If there is interest, maybe I'll try to polish it up some and release it into the wild as open source. If there's not, that's fine too, less work for me.
Incidentally, I decided to sit down and write this after completely failing to come up with an adequate path for exporting Mathematica work to the web. None of the options quite worked out for me, but perhaps it was just me.