>Name one open source IDE which is superior to Visual Studio.

Here's a list in no particular order of open source editors/IDEs I would use over Visual Studios.

1. Vim.

2. Atom.

3. Brackets.

4. LightTable.

5. Codebox.

6. Slap.

> Or an open source database that is better than SQL Server.

Depends on what you mean by better and what compliance you need I guess? MongoDB can provide benchmarks better than SQL Server.

> Not to mention C# which imho is the best language out there...

Language preferences obviously change based on the needs of the developer. I prefer javascript just because I need a language that can run anywhere and I prefer prototypal inheritance over classical.

> In terms of documentation MS is light years ahead of everyone.

What about MDN?