GQueues is the premier task manager for Google and G Suite users. GQueues tracks millions of tasks for people, companies and organizations worldwide. Designed with a focus on simplicity, GQueues stays out of your way so you can get things done. The GQueues apps for Android and iOS utilize robust, secure syncing to keep your tasks available anytime, anyplace. Stay organized and reduce stress whether you're on the couch, at the office or on the go. GQueues runs on the same infrastructure and servers used by Google's own services, making it highly available, reliable and robust.
You can invite any user as a collaborator on a project. Please note any collaborator in a shared project can add or edit any tasks.Task Management Tools Todoist
Though we don't have a dedicated feature to track issues, Todoist should flexible enough to handle it by using labels, tasks, due dates, and comments.Task Management Tools Todoist
Yes, you can. Turn emails into tasks in the click of a button and never forget to follow up on important messages.There are 3 ways to keep your email organized with Todoist:Download our apps for Gmail and OutlookForward emails to Todoist (Premium-only)Use a 3rd-party integrationTask Management Tools Todoist
Currently we don't really have subtasks. We use checklist items for that purpose.You can track, if they are completed or open and you can also convert a checklist item to a task. It fulfils the purpose of a subtask in our experience.Task Management Tools MeisterTask
Yes, we have built an extra add-in to create tasks via outlook and gmail:The MeisterTask for Outlook add-in turns your emails into tasks and automatically inserts them in the project and section of your choice. TheTask Management Tools MeisterTask