I’ve blogged about the value of SQL Server Developer Edition for years. It’s Enterprise Edition with a End User License Agreement (EULA) that states you cannot use the SKU for production. Developer Edition used to sell for around $50 USD, but it is now free!
Download SQL Server 2014 Developer Edition today!
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Well, not exactly free, it comes with some addendum: “SQL Server 2014 Developer Edition is now a free download for Visual Studio Dev Essentials members”