I think Microsoft To Do is helpful for people who don't need a lot of customization in a task manager. I prefer using 3rd party task managers that allow me to create projects with tasks and subtasks. But for a team that already uses Microsoft products and doesn't want to learn or invest capital in another task manager, Microsoft To Do covers the basics and syncs with your calendar.
If you have more than 2 developers this thing is basically a requirement within github to manage sprints if you use agile methodology. Why use a different website entirely when you can run your entire board right from github itself? I've tried other solutions but basing everything on github issues makes it so no duplicate work has to take place. If the UX quirks and mobile were fixed this would be 10/10 for me! If you're only one or two devs on a team it may be overkill to use, but if you're going to scale it's better to put the process in early.
Wunderlist is what you need for your to do lists. It's really simple to use.
Allows you to set due date to your lists, share them with your team and/or create a folder to divide and organize all your list set
Also, Wunderlist is compatible with all platform and devices. So you can always be updated on your list or work on them from wherever you are and with all the devices you have.
User friendly, easy to configure, and VERY simplistic. I particularly use heavily the phone app feature. While others in the room are on social media, I am reviewing my tasks and this triggers other tasks I know I need to get done. I like the sense of accomplishment of moving things to the completed pile as well.
Once it's up and running it's easy to use. It needs a little consideration to get set up perfectly for your own needs, but that is the same for any feature-rich software.
I have not had an issue where I needed to reach out to Wunderlist, but I know their contact and online chat is easy to access and feel confident that they would be helpful. My only worry is Wunderlist is becoming Microsoft to-do in May 2020, and I believe the app will become worse after that.
Support is good, but quite honestly, I haven't needed any support since 2015. As I remember, I was required to open a ticket and had to wait a few days for resolution. I give it a rating of 8 because of the lag in getting a solid resolution, but it was resolved adequately.
It's a small tool compared to bigger project management software, but we found that they work perfectly together. It helps you declutter the larger PM tools, keep your smaller tasks in-line and make sure they get completed. When you're working in a creative agency, ideas and tasks are flying around, so having a tool like this that keeps you accountable and reminds you of your tasks is a must!
I have used Workfront in the past, which in my experience, is best with a traditional waterfall methodology, similar to Microsoft Project and the other more traditional project management software projects. ZenHub is truly designed around the agile methodology. Other products that claim they are agile oriented seem to just be adjusting and tweaking their traditional product to include a few agile features.