Occasionally, I'm impressed.
This is one of the startups with enormous potential that I consider worth watching:
Repl.it lets you start coding in your favorite programming language in 2 seconds; it lets you build and deploy apps right from your browser. The founders wanted to build something to solve their own problem -- back in school they were tired of setting up their development environment on every machine they wanted to code on, and they dreamed of a world where you could just open a tab in the browser and start working. They built Repl.it to give developers access to simple, powerful tools and a community of hackers, aspiring programmers and teachers. They make it possible to learn, practice and build, all in the same place.