A.nnotate.com – annotate and export PDFs

Submitting because I was very impressed with this tool. It's worth logging in - the interface and features are much better than the limited website suggests.

Also submitting though because the actual marketing website almost completely put me off at first - I nearly clicked away instantly. This shows that a great tool with a great UI can really suffer if its marketing materials aren't up to scratch.

I get that disliking a site design is a matter of preference, but the difference between the two halves is remarkable. Given that both are web-based I'm not even sure how this can happen.