ACE 5357 ATTINY85 USB Development Board

The ATTINY85 USB Development Board is similar to the Arduino but smaller and cheaper. Though the chip seems to be small, it is powerful enough to support many functionalities like that of Arduino. It has the ability to use the familiar Arduino IDE which makes it a great way to jump into microcontroller electronics.

Features:
Support for the IDE 1.0+ (OSX / Win / Linux)
Power via USB or External Source – 5v or 7-35v (12v or less recommended, automatic selection)
On-board 500ma 5V Regulator
Built-in USB (and serial debugging)
6 I/O Pins (2 are used for USB only if your program actively communicates over USB, otherwise you can use all 6 even if you are programming via USB)
8k Flash Memory (about 6k after bootloader)
I2C and SPI (vis USI)
PWM on 3 pins (more possible with Software PWM)
ADC on 4 pins
Power LED and Test/ Status LED (on Pin0)