Todoist
Freemium
Todoist: To-Do list and Task Manager.
TickTick
Freemium
TickTickis a cross-platform to-do list app & task manager helps you to get all things done and make life well organized.
taskblitz
Freemium
taskblitz is set of tools to collaboratively get your work done including project management, chat, time tracking and invoicing.
Yodiz
Freemium
Yodiz is a simple but comprehensive agile tool with visual boards for Sprints, Releases, Backlog, Epics and Issue management.
Teamwork Projects
Commercial
Teamwork Projects is a project management app.
Compare GQueues with alternatives
Compare Teamwork Projects and GQueues and decide which is most suitable for you.