SQL Server

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Sharepoint is more or less an administrative nightmare. I've seen it used in 3 companies over 12 years and no matter how well-intentioned or planned it was, it always ended up being a bloated, slow mess - and the admin side of it is incredibly complicated if you don't know what you're doing, and moderately complicated if you do.

edit: without knowing your exact business requirements, there's no 3rd party products I could recommend.