SwitchBlox Nano - Tiny 3 Port Ethernet Switch from BotBlox on Tindie
32 Channel Ethernet Wifi Relay Controller Home Automation Diy Voice Switch Panel App For Wan And Lan No Internet Alarm Sensor - Automation Modules - AliExpress
tuxgraphics.org: An AVR microcontroller based Ethernet device
SwitchBlox Nano - Micro Ethernet Switch 3 Port Network Switch
DIY Ethernet hub? | Tom's Hardware Forum
Amazon.com: TRENDnet 4-Port Gigabit Switch with SFP Slot, TEG-S51SFP, 10 Gbps Switching Capacity, Fanless, 802.1p QoS, Rear Facing Ports, Metal Housing, Network Ethernet Switch, Lifetime Protection, Black : Electronics