Gefen Inc.
{4x4 HDMI Matrix}

Grandbeing Technology Co., Ltd.
{HDMI splitter : 1 by 4 , 1 by 8 , 2 by 8 , 2 by 2 , 1 by 2
HDMI switcher : 3 by 1 , 5 by 1 , smart 3 by 1 ,5 by 1
HDMI converter : YpbPr + S/P DIF – HDMI , VGA + DVI + L/R + S/PDIF ---- HDMI ,
HDMI extender : CAT5 HDMI extender , HDMI cable extender}

Octava
{4 x 1 HDMI Switch with Optical Toslink Routing}

XtremeMac
{HDMI Switcher}

Technical HDMI Description and pin out.