What are your project management tools?

I was recently asked this in an online forum. The question in itself felt like a loaded one. Being a freelance developer, I get exposed to many various platforms, such as Trello, Jira, Teamwork, Accelo, and Basecamp to name a few. For all my projects that I run on my own, I use Basecamp. It has some great features that allow you to keep all files, lists, chats and more with each client. If I need a kanban style project layout, I go with Trello. There are so many tools out there and I am sure I will be using many more. So which project management tools are you using?