ATTINY85 General Micro USB Development Board

From the shop's description

Description Although small in size, but great in capabilities. The ATtiny85 based mini development board is similar to the Arduino but cheaper and smaller (of course a bit less powerful). With a whole host of shields to extend its functionality and the ability to use the familiar Arduino IDE, this board is a great way to jump into microcontroller electronics. ATTINY85 General Micro USB Development Board Features Support for the Arduino IDE 1.0+ (OSX/Win/Linux) Power via USB or External Source Onboard 5V Regulator Built-in USB 6 I/O Pins 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