I, Shinji - The song of our Third Child, the irreplaceable Shinji.
Cruel Angel's Thesis - The full length version of the Evangelion TV series' theme.
Fly Me to the Moon - A version of the TV series' ending theme song. Didn't Frank Sinatra sing this once?
Soul Refrain - The theme song to the Evangelion movie, "Death and Rebirth."
Thanatos- If I Can't Be Yours - This is the theme of a different Evangelion Movie (the Eva Movies were basically the same, but each one getting more and more detailed), possibly the "Air" movie. This song has wonderful English Lyrics.
Rei I - Rei Ayanami's first theme, one of the most haunting, freaky, spooky piece of Evangelion music. Do not listen while in a dark, scary place or while operating heavy machinery cuz then, ya know, things'll just get messy.
Rei II - Rei Ayanami's second theme; she's so important she has three, count em, three.
Borderline Case - I'm not quite sure when this song plays during the series. Probably one of those times when Shinji is going insane.
Marking Time, Waiting for Death - A tune even more freaky than Rei I, heard when Shinji is trapped, dying, and hallucinating inside Unit 01.
A Step Forward into Terror - This is what Adrenaline would be if it was a song and not a chemical.
Both of You, Dance Like You Want to Win! - Not only is this a good song, but it has the coolest title I have ever heard.