SQL

Its easy to make GUIDs in SQL/TSQL. Below is clean code to get GUIDs. This creates GUIDs or UUIDs that are version 4. Where a '4' begins the third group of digits. 

declare @guid uniqueidentifier;
set @guid =  NEWID();
select @guid as MyGUID;

*Claims to conform to RFC 4122 GIUD specification when possible*