2nd Opening Song: "I Am" Episodes 35 to 64
3rd Opening Song: "Owarinai Yume" Episodes 65 to 95
4th Opening Song: "Grip!" Episodes 96 to 127
5th Opening Song: "One Day, One Dream" Episodes 128 to 153
6th Opening Song: "Angelus" Episodes 154 to current
1st Ending Song: "My Will" Episodes 1 to 20
2nd Ending Song: "Fukai Mori" Episodes 21 to 41
3rd Ending Song: "Dearest" Episodes 42 to 60
4th Ending Song: "Every Heart, Minna no Kimochi" Episodes 61 to 85
5th Ending Song: "Shinjutsu no Uta" Episodes 86 to 108
6th Ending Song: "Itazurana Kiss" Episodes 109 to 127
7th Ending Song: "Come" Episodes 128 to 148
8th Ending Song: "Brand-New World" Episodes 149 to current
You can download some of the songs here and here