Simple Poll - The easiest way to create polls in Slack

Zendesk - Zendesk is a beautiful, lightweight help-desk solution.

iPoll.app - Create instant polls and forms with in slack!

Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community

Twitter Polls - Polls embedded in tweets

HelpScout - Help Scout is a simple, straightforward way to provide excellent support