Alot of the old jungle and hardcore used the amen break, but then I guess alot of house, techno and trance used very similar drum patterns. Here's a few Amen free Drum & Bass classics.
[ame=http://www.youtube.com/watch?v=rFVHjZYoq4Q]LTJ Bukem - Horizons - YouTube[/ame]
[ame=http://www.youtube.com/watch?v=7Z-6e3zIE2k]Drum n Bass - Nasty Habits - Shadow Boxing (Doc Scott) - YouTube[/ame]
[ame=http://www.youtube.com/watch?v=B1o5aclZg1s]Aphrodite - Dub moods (The Greatest Trick) - YouTube[/ame]