Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Papermind - Papermind Slack App is a collaborative article-editing and document management platform for Slack
TaskPaper - Plain text to-do lists for Mac
Quip: Team Documents for Slack - Create, share and get notified about Quip docs in Slack
Magnetic - Magnetic is an all-in-one agency management software built for productivity.
Workflowy - A better way to organize your mind.