Tiago Forte - The Secret Power of Read-it-Later Apps. I've stayed away from these solutions since Firefox introduced Pocket, but this makes a very compelling case.
Compare PKMS by selecting your most important features and seeing which products offer them. It's how I found logseq to by my PKMS of choice.
SiYuan - Privacy-first Offline-first personal knowledge management system that supports Markdown, block-level ref, and bidirectional links, and transclusion
