As one of the founding fathers in this thread i have some my faves to add on here.
*Inside
*Frontiers
*Live Feed
*Gutterballs
*Laid to rest
*Dard Divorce
*Tumbling doll of flesh
Martyrs is an awesome film,i forgot to post it on here...The french are leading the pack when it comes to brutal violence and martyrs is a fine example.
I like the Fulci films - Zombie Flesh Eaters (Zombie in the US), House By The Cemetery, The Beyond, City Of The Living Dead (Gates Of Hell in the US). He does really nasty gore, and there's a real feeling of horrible, scuzzy horror in all of those flicks.
You can't really go wrong with Romero's original zombie trilogy, especially Dawn and Day, and even Land Of The Dead wasn't too bad (I haven't seen Diary...)