This looks nice based on my quick look at the demo and the feature list. Seems to be a well-polished project with a good design and documentation. The feature list says it does support notes (an important thing) but I don't see any other information about it or see any notes on the links in the demo. Would be nice to see how that works.
Oh yes, I created a reminder to extend the documentation about notes. Here's a quick summary: they are used to store additional text for a link (whatever it might be) and can be added / edited from the link detail page, e.g. https://demo.linkace.org/links/87. Although I do not use them a lot I think they can be used to add more context or details about a link without using the description. Like more details about why you added the link, how to find more details on that said link, and so on. I think this might become more powerful and useful when support for multiple users is ready. Notes can then be used like a low-level comment system.
