[janlukacs]

We use a combo of our own tool: Paymo - https://www.paymoapp.com (i'm a co-founder) and Jira - https://www.atlassian.com/software/jira

There are tons of PM tools out there, with Paymo we try to cover a bunch of needs in the same tool, while keeping it simple. I sometimes hate the complexity of Jira, but at the moment it's better suited for certain projects then our own.

[Cameliza]

I use Paymo as well and I'm very happy with it. It's got a nice user interface and I love that I have everything I need in a single app: time tracking, task management, and invoicing.