Editor Jeani Rector has put together a quite impressive online mag, featuring works by Ramsey Campbell, and Joe R Landsdale to mention a couple. The Horror Zine has made the British Fantasy Society Short List for Best Magazine 2012.
Deep Underground Poetry
A pretty good haunt for some very talented poets.
Stygian Publications blog
R Scott McCoy, editor of recently demised Necrotic Tissue, keeps you updated on the future endeavors of Stygian Publications.
Great looking British magazine of tastefully done horror. Issue #6 features "Angels and Sirens".