Make an Internet connected project with this awesome and low cost Wifi module. It is a module by Espressif, an 80 MHz microcontroller with a full WiFi front-end (both as client and access point) and TCP/IP stack with DNS support as well.
This is the latest version, ESP-12E, which has the SPI flash pads brought out on the bottom row. Note that you cannot use them for GPIOs or anything, they're there so you can program the FLASH chip only.
Comes with 4MB flash chip, ESP processory, and onboard antenna. These come pre-progammed with the NodeMCU Lua firmware, so you are ready to rock.If you need something ready to use, we also sell Adafruit HUZZAH ESP8266 Wifi Breakout Board