Shuffle: Opening song "YOU" (Episodes 2~14, 16~24)
Ending song "innocence"
Insert song In the Sky ( Episodes 1 and 15)
Season 2 Brief
Goodbye Mr. Despair:
Title: 人としてaxisがぶれている
Fantasy ルンバ
Ringo もぎれビーム!
Strong introduction ni マイYeah～
Ending: マリオネット
オマモリ
Despair レストラン
Love in the dark heart
Disgaea:
Title: "I Want to Love" (爱したげる)
Ending: "Chain"
Gundam X:
Opening: DREAMS
Resolution
Ending: HUMAN TOUC
HUMAN TOUCH (Japanese version)
Silver Horizon
Death Note:
Title: the WORLD
What's up, people
Ending: アルミナ
Despair ビリー
Ueki's Law:
Opening: Falco -ファルコ
No Regret
Ending: こころの法星～Little planets～
Earthship～Spaceship Earth～
rom△ntic high
p>ボクたちにあるもの
True Blue
Saiyuki (omitted)
GEAR Warrior Electric Boy (omitted)
Pokemon (omitted)
Sad Ninomiya-kun (this thing is good)
Opening: ユビキリ
Ending: ふれふれっぽんぽん!
Detective Academy Q:
Title: Lost Q!? Labyrinth
Luvly, Merry-Go-Round
100ピュア
Ending: 爱こころ
Rainbow Sea
みえないストーリー
风に向かいStepくように
Sailor Moon (omitted)
Gundam 00 (omitted)
That’s all for now, but you didn’t even give me points.
It’s very easy to find anime music. Just use Kugou to search: (anime name) ED or OP refer to the opening and ending respectively. You can also enter the interlude directly.