Credits to @angryparkranger on YouTube for making this amazing song.

Sweden from Minecraft but it's actually Pink Floyd

BattleBlock Theater Music  Menu Theme

Castle Crashers OST - Jumper

You can download the whole albums here: http://www.thinkwithportals.com/music.php 
Otherwise, you can just download the singular track straight from here.

Portal 2 Soundtrack - Halls Of Science 4

autumn comes around (STBB 968)

I, Swinger

The Millionaire's Holiday

Jake Chudnow - Moon Men (Instrumental) (vsauce)

The Museum (Boneworks OST)

Portal - Radio

The song you hear on the radio in Portal 2.

Portal 2 Radio Song

The music that you hear when you install Windows XP (or not because your audio drivers were not yet installed), welcoming you to the once new version of windows.
You can find the music after the install in %SystemRoot%\system32\oobe\images\title.wma
Made in 2001

Jake Chudnow - Moon Men (Instrumental) (vsauce)

FREEGRIMM