Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Simple Poll - The easiest way to create polls in Slack
Any.DO - The #1 task management app used by over 11 million people globally, Any.do is your free mobile and online task manager for Android, iPhone, Web and more.
GitHub Polls - Polls for GitHub issues and readme
Microsoft To-Do - Task management tool
Curious Polls - Answer a question once a day for the chance to win £100/$100