It's limited what VSDE member can do with it. Also: SQL Server 2016, when released later this year, will also be free.

SQL Server 2014 Service Pack 3 (SP3) was announced on Wednesday, about two years after the release of SP2. SP3 is a cumulative update, which means that it'll upgrade "all editions and service levels ...

SQL Server 2014 hit its 'release-to-manufacturing' milestone today, with Microsoft projecting an April 1 commercial release.