Amplenote is hands down the best note-taking and productivity tool out there. It has the perfect blend of simplicity and power features, enabling you to build your workflow to get things done. I feel like I tried every other option before I found Amplenote. I only wish I had found it earlier. I'll admit that there is a bit of a learning curve, but if you stick with it, the payoff is huge. It's a shame that it is not more well-known.
Amplenote