40-pin
4 devices
BigTreeTech BTT Pi V1.2
Single Board Computer
Single board computer by BigTreeTech with Allwinner H616 quad-core Cortex-A53, 1GB DDR3L RAM, WiFi, 100Mbps Ethernet, and 40-pin GPIO. Drop-in Raspberry Pi CM4 alternative for Klipper 3D printing.

BigTreeTech CB2
Single Board Computer
Compute module by BigTreeTech powered by Rockchip RK3566 quad-core Cortex-A55 at 1.8GHz, 2GB/4GB LPDDR4, 32GB eMMC, Gigabit Ethernet, WiFi 5 (802.11ac), and Bluetooth 5.2. CM4-form-factor.

Libre Computer Alta
Single Board Computer
Libre Computer Alta (AML-A311D-CC) — Amlogic A311D hexa-core SBC with 4GB LPDDR4, 5 TOPS NPU, Mali-G52 GPU, 4× USB 3.0, Gigabit Ethernet with PoE, and 4K HDR HDMI 2.0 in a Pi-compatible form factor.

Libre Computer Solitude
Single Board Computer
Libre Computer Solitude (AML-S905D3-CC) — Amlogic S905D3 quad-core Cortex-A55 SBC with 2/4GB LPDDR4, 1.2 TOPS NPU, 4× USB 3.0, Gigabit Ethernet with PoE, and 4K HDR HDMI 2.0 in a Pi-compatible layout.
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More to explore — popular traits shared by devices with GPIO: 40-pin.