LINQPad lets you interactively query SQL databases
in a modern query language: LINQ. Kiss goodbye to SQL Management
Studio!
it's a highly ergonomic code snippet IDE
that instantly executes any C#/VB expression, statement block or program – the ultimate in dynamic development.
Best of all, LINQPad standard edition is free and can run without installation
(or with a low-impact setup)
NLog is a free logging platform for .NET with rich log routing and management capabilities. It makes it easy to produce and manage high-quality logs for your application regardless of its size or complexity.