The Adafruit HUZZAH ESP8266 breakout is what we designed to make working with this chip super easy and a lot of fun. We took a certified module with an onboard antenna, and plenty of pins, and soldered it onto our designed breakout PCBs. We added in:
Reset button,
User button that can also put the chip into bootloading mode,
Red LED you can blink,
Level shifting on the UART and reset pin,
Two diode-protected power inputs (one for a USB cable, another for a battery)

Two parallel, breadboard-friendly breakouts on either side give you access to:
1 x Analog input (1.8V max)
9 x GPIO (3.3V logic), which can also be used for I2C or SPI
2 x UART pins
2 x 3-6V power inputs, reset, enable, LDO-disable, 3.3V output

Each order comes with one assembled and tested HUZZAH ESP8266 breakout board, and a stick of 0.1" header that you can solder on and plug the breakout into a breadboard. A soldering iron and solder are required for that, and aren't included. Solderless breadboard also not included. You'll really want a USB-serial cable such as a USB console cable (good for Windows, not suggested for MacOSX users), FTDI Friend (great for any OS), or FTDI cable (great for any OS) to upload software to the HUZZAH ESP8266!

Features:

• <b>Price For:</b> Pack of 1 <b>Manufacturer</b>: Adafruit Industries <b>Product Category</b>: WiFi / 802.11 Development Tools <b>RoHS</b>: <b>Product</b>: Breakout Boards <b>Tool Is For Evaluation Of</b>: ESP8266 <b>Protocol Supported</b>: 802.11 b/g/n <b>Frequency</b>: 2.4 GHz <b>Operating Supply Voltage</b>: 3.3 V <b>Antenna Connector Type</b>: Internal <b>Brand</b>: Adafruit <b>Description/Function</b>: Breakout board for ESP8266
• <b>Dimensions</b>: 38 mm x 25 mm x 5 mm <b>Interface Type</b>: I2C/SPI, UART <b>Packaging</b>: Bulk <b>Tradename</b>:

UPCs:

• 717520030263
• 717520031468
• 600346598843
• 788476065548

EAN:

• 0788476065548