I tried a few more as well:

VB:

Code:
Sub main()
    Debug.Print -2 ^ 2
End Sub


-4

-----

Python:

Code:
-2^2


-4

-----

C++ (MingW compiler):

Code:
std::cout << -2*2;


-4

-----

C++ (Visual C++ compiler)

Code:
std::cout << -2*2;


-4

-----

Javascript (Tried in internet explorer and firefox - although I don't think the browser matters)

Code:
document.write(-2^2);


-4

-----

Jscript

Code:
WScript.Echo(-2^2);


-4

-----

VBScript

Code:
MsgBox -2^2


4

-----

Google

Code:
-2^2


4

-----

Calc.exe

Code:
-2^2


-4

-----

PHP

Code:
echo -2^2;


4

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