We're using Bootstrap for our site, Podium: https://podium.live https://podium.live. It was a great way to get started, we had a decent looking app for a while,

We're using Bootstrap for our site, Podium: https://podium.live https://podium.live. It was a great way to get started, we had a decent looking app for a while, then once we could hire a designer we were able to modify where needed. It really does make a difference.