We have an ancient AS/400 730 system that still houses some old budget/financial data. We'd like to decommission this box, and migrate the data to a SQL server.

Some of the best open source SQL Clients for Database Management are Sqlectron, SQuirrel SQL client, SQL Chat, OmniDB, HeidiSQL,Falcon, etc.

An early preview of database migration services, allowing Oracle and SQL Server applications to be more-easily shifted to Azure, is also part of today's Build keynote.