Ask HN: Favorite Project Management Solutions?

We're a small web startup with a CEO in New York, a CMO in Vancouver, a CTO with 4 developers in San Francisco, and a small outsourcing team offshore. We use Git for SCM, but we haven't found an ideal solution for communicating everything else.

Taking into perspective our fractured company structure, what project management solutions can you guys recommend?

I know this question has been asked in the past, but like all other software, the options keep changing.