How to Collaborate with my team ?

I have a small team online i need to see,manage and share my advice to workers.
how can i do this ?

This should really help you
10 Best Free Collaboration Tools For Indies And Small Groups

And for my personal experience i use github and its other service gitter for instant chatting with developers chatroom.
managing codes is easier on github.

Skype, bitbucket and sourcetree: [Tutorial] Version control in Unity using Mercurial, Source Tree and Bitbucket - Make Games South Africa

If you’re not a fan of bitbucket and sourcetree, use dropbox.