Whatis - Manage & organize your team's knowledge straight from Slack
Breaking - Short news in your Today tab for Mac and iOS
Slack-News - Read news from multiple sources within Slack by just typing
Bootstrappers - Bootstrappers.io curates articles for bootstrapped founders
Slack It - A bookmarklet to share links in Slack with one click
Open Startups - Open startups with their metrics, interviews, and stories