Rebrandly - Rebrandly is the easiest way to create, share and manage branded links.
Memonia - Automatic knowledge discovery and sharing for Slack
netboard.me - netboard.me allows you to combine all your content into a beautiful single web page.
Whatis - Manage & organize your team's knowledge straight from Slack
WhatsApp Share Link Generator - A handy tool to generate WhatsApp sharing links.
Slack-News - Read news from multiple sources within Slack by just typing