Two lads from Ghent University in Belgium, Karel Bruneel and Benjamin Schrauwen, got tired of the traditional tools used to build electronics manufacturing. Rather than rage silently at their breadboards, the created Circuits.io, a website that lets you create circuits in Chrome and view the rendered PCB.
Best of all, the lads are solid free-software fans who will never lock your designs.
Electronics fans: would this site be helpful? Maybe tell the lads what they can do to make it better?