Hacker News Stack - Focus on the really fresh and unread news in Hacker News.
Hacker Newsletter - Best of Hacker News in your inbox every Friday.
Hacker News Front Page Explorer - A database of top ranking Hacker News front page posts
HackerWeb - A simple and readable Hacker News app
Slack-HN - Read Hacker News right from Slack
Learnerd - Get your Hacker News fix inside Facebook Messenger