The answer is YES! Microsoft has developed charity pricing plans for Nonprofits.
Qualified nonprofits can get Office 365 Enterprise E1 as a donation (free), and they may also upgrade to the additional advanced features in Office 365 Enterprise E3 for Nonprofits at a significant discount (currently $4.50) per month: Compare Plans.
To get started with the donation, sign up for the free trial: Office 365 for Nonprofits  or contact us.
This posting is provided "AS IS" with no warranties, and confers no rights.