Have a look at TasksInaBox ( https://tasksinabox.com/ https://tasksinabox.com/ ). What is nice is that besides the usual web and mobile apps, it also has a clie

Have a look at TasksInaBox ( https://tasksinabox.com/ https://tasksinabox.com/ ). What is nice is that besides the usual web and mobile apps, it also has a client living inside Outlook so you can create tasks from emails as they arrive in your inbox.