It's so awesome to visit a website randomly and then realize it uses your open source code! I was looking at this template for some design ideas:
http://canvaskite.com/marketplace/webpro/dark-theme/index.htmlwhen I saw the big graph (last graph on the page). I thought to myself: Oh that looks pretty cool! But I thought there were no SVG graph libraries around that work like that, which is why I made my own. So I was really angry for a second, thinking I wasted my time when there was already a library out there that worked apparently much better than mine. But then I clicked the button to view another type of graph, and saw the animations run. I got a WHOA feeling, looked at the source code, and sure enough, it uses the library I made for graphs.
It feels amazing to know that you've contributed to the web and made something other random people actually use and like. Especially when it works nicely.
Also, I'm a horrible designer so this looks much better than my examples on the github page, which is what caught me off guard.
My Code:
https://github.com/uriahsanders/Graph.js