Hi All, I wrote a blog detailing the tools we currently use in Squeaky Wheel, a small, mostly work from home game studio.  You can read the whole thing here, but the tl:dr version is:

Company Chat = Flock. Free version offers better value than Slack.

Production/Sprint Tool = Hacknplan. Best tool for hitting the ground running, especially if you don't have a full time producer.

Spreadsheet/Data Analysis = Airtable (sometimes). Offers a robust set of tools that helps you parse data. But sometimes google sheets is more than enough.

I absolutely love HacknPlan. One of the greatest websites on the planet if you ask me. I was watching Game Dev Underground and got super motivated. He mentioned project management. I did a quick search and found these guys. I've managed to do a lot of work on my game and stay motivated because of the boards and tasks. Great stuff.