Amazon.com: 4Pcs ESP8266 Serial Wifi Module ESP-01 Updated Wireless Transceiver Board 3.3V for Arduino : Electronics
ESP-01F Ultra-Small WiFi Module (ESP8285) with External Spring Antenna — KKSB Cases
TiWi5 Dual-Mode WiFi Module with Bluetooth
nRF24L01 2.4GHz Wireless Module (1km) | 102100 | Other by www.smart-prototyping.com
OEM Wi-Fi Module with Fully Integrated Support for Digi Remote Manager | Digi International
Pololu - Wixel Programmable USB Wireless Module (Fully Assembled)
Pololu - Wixel Programmable USB Wireless Module
Amazon.com: Wireless Module WiFi Sensor, Wireless REV1 WiFi GPS Module Board with Battery Base LED Signal, WiFi Module DIY Support Wireless Internet Access : Electronics
NRF24L01L Long Range Wireless Module R2, 1.1KM, PA LNA – ElectroDragon
Adafruit ATWINC1500 WiFi Breakout : ID 2999 : $24.95 : Adafruit Industries, Unique & fun DIY electronics and kits