I think it's common knowledge at this point, but Agnetha is a songwriter as well, composing songs since the age of 5. While she didn't compose much during her ABBA days (the only ones she wrote are Disillusion and I'm Still Alive) she wrote and released numerous songs during her solo career before and after ABBA.

I can't guarantee that this is a complete list, but I did the best I could, even adding two more songs since the first time I uploaded this compilation.