For the last month or so I have been receiving a lot of requests for freelance work. As a freelancer just starting off, all you want is for people...
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I'm personnaly using Github project tab(sort of like jira)/issues tab on private repos i'm handling for clients.
it's like a jira but it packs everything on the product itself. and no need for other channel of communication.
of course, a pen and notebook is mandatory as a daily tool to use (mostly when out of a computer)
For time tracking I use TMetric app. It is easy-to-use and integrates with Trello. Trello boards are mapped to TMetric projects and this app provides powerful reports. tmetric.com/