monday.com

monday.com allows teams to work in a way that fits their unique needs, working from home or anywhere. It's where you set goals and align teams without meetings. Easily share status updates, action items, and files with team members no matter where they are. Live system, updates and task status update instantly for all users in real time.

The easy-to-use and flexibility software features fast onboarding for your team and the ability to customize workflows your way. It's incredibly easy to create a work flow or "Board", add participants and follow the progress of many tasks with ease.

monday.com have many powerful productivity features such as time tracking, automated notifications, dependencies, timeline views and integrations. Your team can achieve better and faster results for every project milestone. You can attach any supporting documents needed to each post and tag a specific user.

Also, monday.com seamlessly integrate with many tools: Zoom, Email, calendar, Slack, Dropbox, Spreadsheets, and much more. This gives your team greater visibility and keeps everyone in constant sync.

Although no subtasks, the application's flat task structure hugely improves clarity. Email and desktop notifications alert you on any activity and there is a web based site you can go to or the even better desktop and mobile app versions.

monday.com has free version with unlimited users. But it has only 500M to save files, images, and important documents. The items within boards can be task, project, customer, etc. Each free account starts with 200 free Items. You can get more Items by referring friends to create their own accounts.