The best alternatives to ToDues are Todoist, /todo, and Mac TODO Menubar. If these 3 options don't work for you, we've listed a few more alternatives below.
What do you think of ToDues?
Haggle — A CTA buyers want to click, when they aren't ready to demo
Delightfully simple and deceptively powerful task management. Join 30 million+ people organize billions of tasks in Todoist for their work, education, and personal life.
A useful todo app that has big plans for future. Users are able to vote for next features, and propose their own ideas. You can try out the application without installation on the app's website.