Chatlio - When you have a business to run, your average instant messaging software just will not do. You need an internal presence upon which your entire team can collaborate on. Read more about Chatlio.
Simple Poll - The easiest way to create polls in Slack
slalert! - Get notified in Slack when your company/keyword is mentioned
GitHub Polls - Polls for GitHub issues and readme
Talkus - Chat with your website users from Slack
minipoll - Create simple shareable polls in seconds