By default, Windows includes a layout called United States-International, which allows typing many non-ASCII characters. It is very useful for several Latin-script based languages.
The layout also designates several keys as "dead keys", particularly the apostrophe (') and double quotes ("). So to enter double quotes, you have to type " followed by space.
When writing code, this can be very annoying, since the apostrophe (') and double quotes (") are used frequently.
This repository contains a layout that is identical to United States-International keyboard, but instead uses the AltGr (Ctrl+Alt) key in combination with the apostrophe ('), double quotes ("), circumflex (^), backtick (``) and tilde (~) as dead keys.
The layout file can be opened with Microsoft's Keyboard Layout Creator (MKLC) tool, which Microsoft distributes for free. After opening the file in MKLC, choosing Project -> Build DLL and Setup Package will create an installer that can be used to add this layout to Windows.
Remember to log off and on again, in order for the changes to take effect.