Bookmarked XODO PDF Reader & Annotator (xodo.com)

With Xodo, you can edit, annotate, sign, and share PDFs on desktop, mobile, and web. Xodo makes working with PDFs quick and easy, so you can get things done.

I’ve used Adobe and Nitro in the past, I wonder how this compares?

Hat tip: Kimberly Hirsh mentioned that she uses it.