Here in Brazil there's a lot of great bands...

The 3 most popular (bands that born recently): Nervosa (Thrash Metal), JackDevil (Thrash Metal) & Cangaço (Death/Folk Metal)

Bands that ain't born recently: Nervo Chaos (Death Metal), Lothlöryen (Folk/Power Metal) & Hangar (Progressive Power Metal)

My personal preferences: Coral de Espíritos (Technical Death Metal), Dynahead (Progressive Thrash Metal) & Toxic Carnage (Thrash Metal)

Other good stuff: D.A.M (Melodic Death/Power Metal), Lacerated and Carbonized (Death Metal), 7th Symphony (Progressive/Symphonic Metal), A Red Nightmare (Deathcore), Espera XIII (Melodic Death/Black Metal), Visceral Slaughter (Death Metal), Woslom (Thrash Metal), Scibex (Avant-Garde Black Metal), Ayin (Technical Death Metal), Morrigam (Death/Folk Metal), Tamuya Thrash Tribe (Thrash Metal) & Others thousands of bands