Votum for Slack - Crowdsourced lists with upvotes, inside Slack
Minimal Reading Mode - Optimize websites for reading: font, contrast, night mode
Must-Read for Slack - Build controllable must-read lists for your team in Slack.
Wordpress Read Time - Shows you the reading time of your blog post as you write
Corpus - Curate, take notes and share your reading list
Spritz Bookmarklet - Speed-read on any website