1. ARM AMBA Interconnect Specification.
http://www.arm.com/products/system-ip/amba-specifications.php
2. EZChip TileGX Multicore Architecture.
http://www.tilera.com/products/?ezchip=585&spage=614
3. IBM CoreConnect Bus Technology.
http://www.xilinx.com/products/intellectual-property/dr_pcentral_coreconnect.html
4. Sonics.
http://www.sonicsinc.com/
5. Xtensa Processors.
http://ip.cadence.com/ipportfolio/tensilica-ip/xtensa-customizable