Need help finding right product

[Robicheaux]

Hello everybody,
about a month ago i stumbled over zimbra and i must say, i was really impressed.
Since then i look for the right version/product to fit my needs. i did read so much in the past weeks, but couldn´t find my answers. So today i registered here to seek your help.

What do i have?
I have 1 Computer winxp, 1 Computer ubuntu, 1 mobile device android.
I have Webspace with php and mysql and so on.

What do i want?
I want my calender and contacts and mails to be the same on all the above components.

What is it that i need to make this work? As i´m a privat person, a free version would be prefered.

Looking for your answers, thank you.