Microsoft offers lots of resources and partner programs for partners and startups.
Here is the link on Microsoft Partner channels you can use for your company.
http://rcpmag.com/Articles/2011/08/01/Hidden-in-Plain-Sight.aspx?p=1
Six MS Partner Channels for Companies
- Microsoft Action Pack Subscription (MAPS) https://partner.microsoft.com/40016455
- Microsoft Action Pack Development & Design https://partner.microsoft.com/40132997
- Microsoft Technet https://technet.microsoft.com/
- Microsoft Partner Silver / Gold Competency https://partner.microsoft.com/40109866
- Microsoft Cloud Partner https://partner.microsoft.com/en-US/cloud-solution-provider/
- Microsoft BizPark for Partners (Give you free full MSDN access) http://www.microsoft.com/bizspark/
- Microsoft MSDN https://visualstudio.microsoft.com/subscriptions/
- Microsoft Student to Business (S2B) is another program I mentioned earlier http://www.microsoft.com/studentstobusiness/home/default.aspx
Microsoft Bizpark is free for startup, privately held and under $1M business. These options will give you access to Microsoft resources to help you grow the business.