Metal Case for NanoPi NEO Plus2 Includes Antenna

Digispark is a development board based on the ATTINY85 microcontroller from ATMEL born in a successful campaign on Kickstarter.
Similar to the Arduino line , It is one of the smallest boards on the market.
Programmable directly from USB with the same Arduino tools. It has a built-in Micronucleus bootloader and can be replaced by similar ones such as the Trinket bootloader. Adafruit or others.
You can use many of the same Arduino libraries and you have your own on the digispark wiki. Arduino compatible Attiny85 Digispark board features:
- USB power supply
- External power supply (7v-35v DC 12v maximum recommended)
- 5V DC 500mA regulator on board
- Programmable with the Arduino IDE
- Loaded with Micronucleus bootloader

ODYSSEY - X86J4105800 Mini PC Win10 Mas expandible (Linux y Arduino Core) con 8GB RAM. ODYSSEY le permite crear aplicaciones de Edge Computing con una CPU potente e interfaces de comunicación enriquecidas. Basado en Intel Celeron J4105, es una CPU de cuatro núcleos a 1.5GHz que se dispara hasta 2.5GHz. También hay un ATSAMD21 Core integrado, un ARM Cortex-M0 + MCU que le permite programar Arduino en la plataforma x86. Versión no activada sin eMMC. También obtenga el estuche re_computer, que no solo es compatible con ODYSSEY - X86J4105 sino también con todos los SBC populares.

DIY Mobile Phone Kit - This  stylish little educational device is an open source mobile phone that you can build yourself. It is compatible with all mobile networks, and its purpose is to motivate people to explore, learn and create something new in a fun and interesting way. Age:+11  

This BeagleBone® Green Gateway development board is a powerful single board computer (SBC). It is based on Seeed Studio's open source hardware and integrates the functions of Wi-Fi + Bluetooth (BLE) + Ethernet +2 Grove connectors, plus a NEON floating point accelerator and 3D graphics. All in one compact board!

This Seeeduino XIAO is the smallest board in the Arduino-compatible Seeeduino family. It is an Arduino microcontroller, integrated with the ESP32-C3 RISC-V microchip. Despite its tiny size, it has enough interfaces for a multitude of applications. MCU board with Wi-Fi and Bluetooth 5.0, supported battery charging, energy efficiency and rich interface.

SparkFun Qwiic Shield for Teensy is a quick and easy way to prepare an expansion board equipped with Qwiic connectors . This shield is compatible with Teensy 4.0, Teensy 3.2 and Teensy LC boards. The board is equipped with an I2C bus connector (GND, 3.3 V, SDA and SCL) and four SparkFun Qwiic connectors

Rock Pi 4 model SE 4GB - single board computer with a high-performance hex-core Rockchip RK3399-T processor. It is equipped with 4GB of LPDDR4 RAM, WiFi and Bluetooth 5.0, a Gigabit Ethernet port with PoE, an HDMI port and 2 USB 3.0 and 2 USB 2.0 ports, as well as a 3.5 mm jack plug. The board has 2 x 20-pin GPIO cables and DSI and CSI connectors for display and camera connections. Rock pi 4 SE is the perfect alternative to the Raspberry Pi

This Seeeduino XIAO is the smallest Arduino compatible plate of the Seeeduino family. It is an Arduino microcontroller, integrated with the SAMD21 microchip. Despite its tiny size, it has enough interfaces for many applications.

The Spectrum Digital XDS100v2 is the second generation of the XDS100 family of debug probes (emulators) for IT processors.
The XDS100 family presents the lowest cost of the entire XDS family of debug probes while supporting the traditional JTAG standard (IEEE1149.1).
In addition, all XDS debug probes support Core and System Trace on all ARM and DSP processors that have an Embedded Trace Buffer (ETB). The Spectrum Digital XDS100v2 connects to the target board via a 14-pin TI connector and to the computer via high-speed USB 2.0 (480 Mbps).
It also requires a license of Code Composer Studio „¢ IDE running on the computer.
Support for Code Composer Studio V4 (Does not support Code Composer Studio V3.3). XDS100V2 Emulator DSP/ARM CCS4/5/6 XP/ WIN7/8/>

It's a tiny board, programmable from the Arduino IDE, that hides enormous potential. The Teensy 4.0 is equipped with a 32-bit ARM Cortex-M7 processor at a blazingly fast 600 MHz. The use of the NXP iMXRT1062 chip makes the Teensy 4.0 the fastest microcontroller on the market at launch.