Whatis - Manage & organize your team's knowledge straight from Slack
BotList - An app store for bots
Slack-News - Read news from multiple sources within Slack by just typing
ManyChat - ManyChat lets you create a Facebook Messenger bot for marketing, sales and support.
Slack It - A bookmarklet to share links in Slack with one click
Chatbot Templates - 50+ bot templates you can use in one click