We here at Phasor Systems LLCs have just launched our Wifi development kit centered around the ESP8266 chip. Our campaign is currently running on Kickstarter. Please check it out at:
http://kck.st/19E2bTw
In addition to our main board, we have 5 additional shields that allow the system to be easily expanded via a stackable PCBA. These shields add a OLED display, a Relay (250VAC @2A), 4x ADC inputs (SPI based ADC chip), SD Card slot, and a Arduino compatible adapter to attached an Arduino UNO. Now at this time, the OLED Display and Relay shields are available. The ADC, SD Card, and Arduino Adapter Shields will be available as stretch goals.
Please also check out our website at http://www.phasor.io
Thanks,
Phasor Systems Team