google apps.
Now that google drive has launched it’s almost complete.
I run my company through google apps and as a partner in another company that also has google apps. I can use mutliple sign ons and can seamlessly move between the two whilst keeping a single inbox. Its fantastic.
The only additional software I need is MSOffice for Excel (hence the need for google drive as opposed to google docs which cant handle proper Excel files)
My colleague has an fruit based piece of junk phone, tablet and computer, but google works perfectly well for him too. I can access all my business on my android phone, tablet and PC and being cloud/web based on any other networked device as and when I need to, anywhere in the world. Shared contacts, files, email, documents, images.
No worrying about hardware, and networks. Just a wireless router and a wireless printer and anyone can use whatever hardware they want.
And all for around $50 a user pa I think.