Pipefy - Pipefy is a process management software that empowers anyone to create and automate efficient workflows on their own without code.

Todoist - Todoist is a to-do list that helps you get organized, at work and in life.

Process Street - Create beautiful rich process documents in a simple to follow checklist format. Fast, free and incredibly simple to use.

Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.

ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.

EssentialPIM - EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and cloud applications.