really liked this --> "From the start, I was aware that I was taking on a huge project that other companies have devoted entire teams to, but I chose to look at it as more of a mental challenge than a technical one. I knew I had the skillset to pull it off, I just had to keep myself motivated and on track."
Sciter is pretty full implementation of HTML5 and CSS, has scripting engine on board, etc. So, indeed, I am personally competing with teams behind WebKit, Trident, Gecko, V8 (JS Engine), Chakra (MS JS Engine) and bunch of others.
And recently with ReactJS (Sciter got Reactor - native implementation of ReactJs), Angular and others.
And that is really a fun project to work on - many different paradigms on the same code base.