I'm a part of a ton of Slack communities but I'm active in only a handful.
Slack works to its fullest only when it is implemented in a team and everyone's supposed to use it for communication. Slack could/should improve on making the communities on it better by adding relevant features.
As a remote designer, this is a must have. I'm always contactable and available. Super easy way to also have quick calls and communicate with other team members on different teams.
- I used Freedcamp for project management. Entirely free, unlimited projects for an unlimited time. They also have a small business plan which includes invoices, CRM and other integrations. Categorisation is super useful and the dashboard home gives you an important overview of each subproject within the main project plus the people working on a particular project. Every subproject can have a task list, milestones, discussions, timesheets, files, calendar, etc.