Nifty - Manage projects, work, and communications in one place.
Simple Poll - The easiest way to create polls in Slack
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
GitHub Polls - Polls for GitHub issues and readme
Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.
minipoll - Create simple shareable polls in seconds