SQL Server Management Studio (SSMS) 2017 is now available for download now. Click here to get it. Download page has further information about new features and compatibility.
Following are some highlights
This release features improved compatibility with previous versions of SQL Server, a stand-alone web installer, and toast notifications within SSMS when new releases become available.
SSMS 17.x can be installed side-by-side with SSMS 16.X or SQL Server 2014 SSMS and earlier.
Support SQL Server 2008 and onward. There is no explicit block for SQL Server 2000 or SQL Server 2005, but some features may not work properly.
Supports Windows 10, Windows 8, Windows 8.1, Windows 7 (SP1), Windows Server 2016, Windows Server 2012 (64-bit), Windows Server 2012 R2 (64-bit), Windows Server 2008 R2 (64-bit)
Click here to get full list of changes
Click here for list of known issues and work arounds