http://osu.ppy.sh/b/149585
http://osu.ppy.sh/b/190503
http://osu.ppy.sh/b/149388
http://osu.ppy.sh/b/293224
http://osu.ppy.sh/b/158870
http://osu.ppy.sh/b/85592
http://osu.ppy.sh/b/82734
http://osu.ppy.sh/b/134447
http://osu.ppy.sh/b/111680
http://osu.ppy.sh/b/244691
http://osu.ppy.sh/b/239363
http://osu.ppy.sh/b/73958
http://osu.ppy.sh/b/68520
http://osu.ppy.sh/b/286577
http://osu.ppy.sh/b/303115
http://osu.ppy.sh/b/274319
http://osu.ppy.sh/s/76366
http://osu.ppy.sh/s/85361
http://osu.ppy.sh/s/74671
http://osu.ppy.sh/s/80468
http://osu.ppy.sh/s/50006
http://osu.ppy.sh/s/92145
http://osu.ppy.sh/s/31333 
http://osu.ppy.sh/s/103718
http://osu.ppy.sh/s/95148
http://osu.ppy.sh/s/9975





http://osu.ppy.sh/p/packlist?t=t 
That has a lot of good beatmap packs.
The Silver Forest Touhou one has quite a few good ones, too.

Songs that are death:
Renard - Blue Night
Xi - Ascension To Heaven