PC104 Vortex86DX3 SBC with Dual Ethernet – WINSYSTEMS
Dual LAN SBC with RK3328 starts at $24
VisionFive2 RISC-V Single Board Computer, StarFive JH7110 Processor with Integrated 3D GPU, base on Linux
Amazon.com: Nanopi R5S Mini Router Cortex-A55 2.0GHz OpenWRT Single Board Computer with Three Gbps Ethernet Ports LPDDR4X 4GB RAM Based on Rockchip RK3568 for IOT NAS Smart Home Gateway Support Android Debian :
PhidgetSBC4 - SBC3003_0 - Phidgets
Industrial Quad-Core Intel® E3845 SBC 2- Ethernet & USB 3.0
XCalibur1931 | 6U VME SBC with NXPQorIQ T2080
A Raspberry Pi Alternative, The NanoPi R2S, Is Up And Coming, Featuring 2 Ethernet Ports
Amazon.com: Vantec USB 3.0 to Dual Gigabit Ethernet Network Adapter (CB-U320GNA),Black : Electronics
Sonus SBC 2000 - VoIP gateway - with 2 DSP modules - SBC-2K-R-2 - Phone Accessories - CDW.com
Mini Dual Gigabit Ethernet Base Board for RPi CM4 (Base Board + Case + US Plug) - RobotShop
ZIO Module with 2 Gigabit Ethernet and 2 COM Ports - AX93291
Upcoming Raspberry Pi Alternative Stands Out With 2 Ethernet Ports | Tom's Hardware
Amazon.com: Nanopi R5S Mini Router Cortex-A55 2.0GHz OpenWRT Single Board Computer with Three Gbps Ethernet Ports LPDDR4X 4GB RAM Based on Rockchip RK3568 for IOT NAS Smart Home Gateway Support Android Debian :
Session Border Controllers - Sangoma Technologies
Amazon.com: Vantec USB 3.0 to Dual Gigabit Ethernet Network Adapter (CB-U320GNA),Black : Electronics
New Small Dual GbE Ethernet SBC - Ventana GW5520 - Gateworks Corporation - Single Board Computers