Toad Edge - Windows GUI for MySQL. SQL Syntax Check. Freeware (Basic Features) & Payware (Extended Features).
LINQPad - A scratchpad for C#, F# and VB code including Linq queries.
Apache MetaModel - Non-Native Database Management Systems
Snippet Compiler - Authors description: "Snippet Compiler compiles snippets."
Kloudio - Self-Service Reporting Without Leaving Your Spreadsheet Connect any spreadsheet to any data source and let your business employees do all of their work where they are most effective.
Linqer - Linqer is a SQL to LINQ converter tool.