CAML Designer 2013
The Belgian user group, Belux Information Worker User Group, has a nifty little free tool called CAML Designer 2013. It supports creating and tuning queries not only in CAML but also Server Object Model, CSOM .NET, CSOM REST & Web Services.
Requirement: Install .NET 4.5 framework first link
Windows 8 and Windows Server 2012 users will receive an message that the program isn’t save, we are looking into this issue at the moment.