In no particular order, here are the top fifty B Movies(well according to me anyways)

Evil Dead II

Re-Animator

Death Race

Escape from New York

Beyond the Valley of the Dolls

The Texas Chainsaw Massacre

Dawn of the Dead

Phantasm

Killer Klowns from Outer Space

Warlock

Orgy of the Dead

The Return of the Living Dead

Bad Taste

Hollywood Chainsaw Hookers

The Toxic Avenger

Silent Rage

Plan 9 from Outer Space

The Evil Dead

Basket Case

Heathers

The Lair of the White Worm

Shivers

The Dark Backward

The Hills Have Eyes

Dark Star

The Big Boss Fists of Fury

Assault on Precinct 13

Two Thousand Maniacs!

Deathstalker

Bride of Re-Animator

Near Dark

Dead Alive

Lone Wolf McQuade

Puppet Master

Alligator

The Beastmaster

Kickboxer

The Car

Swamp Thing

Six-String Samurai

TerrorVision

Xtro

Fist of Fury The Chinese Connection

Super Fuzz

Maniac Cop

Frankenhooker

Angel

Kalifornia

HOTS

Invasion USA