HackerWeb - A simple and readable Hacker News app
Lurchr - Saves all your Slack links, so you can focus on work
HNwatcher - Track keywords and users on Hacker News
Slack News Feed - Get the top posts from every Slack chat you're in.
Hacker News Stack - Focus on the really fresh and unread news in Hacker News.
Slack It - A bookmarklet to share links in Slack with one click