It is safe to assume that almost every wired device will serve as a Zigbee Router.
DIY ptvo.router DIY CC2530 Router ptvo.router
DIY ZigUP DIY Multipurpose CC2530 Router ZigUP
Hive SLB2 Hive Signal Booster SLB2
IKEA E1746 IKEA Tradfri Signal Repeater E1746
Schneider EER32000 Schneider Wiser S-Meter EER32000