By itself, task manager GQueues is pretty handy — a list-oriented task manager with sub-tasks, due dates, assignments, tagging and other neat features. But its integration with Google sign-in, Calendar and Google Apps make it more than just another to-do app.
Not everything that GQueues offers is free, as email/SMS reminders, task assignments and the advanced Calendar integration require a $US25/year subscription (though there's a two-week trial to see if they're needed). Even on its free terms, though, GQueues is a nice-looking app that uses Google OAuth sign-in, so you don't give it your password and yet don't have to create a new password.
You create tasks, sub-tasks, notes and tags on to-do items in a familiar fashion, and can also share those tasks with others, embed them in a public or private web page, and move items around in priority order using drag and drop. GQueues' video demonstration shows off some usage examples of the app:
GQueues is a free app to use in its basic form, with advanced features part of a $US25/year subscription plan. If you think GQueues looks worth it, or wish it had a few other features to sell, tell your task-focused friends here in the comments. Thanks for the link Danny!